The mother of a young Canadian man currently in Syria has been asking for months how and why her son ended up there among a group of extremist fighters.

"How do you sit there and admit to somebody, my son has gone off to fight in a war where I don't know if he's a terrorist or not?" the mother said to CBC's Adrienne Arsenault.

"Are you going to openly admit that? Probably not. ‘Cause the first thing a mother says is, 'What did I do wrong? How could this be my son? What did I do?"

As she worries about her son, the mother is too scared to reveal her identity.

The situation in Syria threatens to escalate, as a panel of U.S. senators on Wednesday voted to give President Barack Obama the authority to use military action against the Syrian government after the White House said the regime carried out a chemical weapons attack.

Estimates vary as to how many Canadians are jihadi fighters in Syria. Government estimates and others who track jihadi fighters put the figure at a range of a few dozen to as many as 100 fighting in Syria against the government, a figure that should cause alarm, given that the public number of Americans fighting there is much smaller, meaning Canada may be overrepresented.

"When you look at it in context, it is certainly disproportionate," said John Amble, who researches regional militant Islamic groups.

"The community of which foreign fighters tend to originate is also much smaller in Canada, there are just fewer Muslims," he said.

A Canadian named Abu Muslim was part of a raid on a Syrian airport a few weeks ago, said Bilal Abdul Kareen, an American filmmaker who has lived among an Islamist group for a year.

"He was a part of that process," Kareen said.

A social media report from a jihadi group claims a Canadian was killed in the airport raid, but CBC could not confirm that or track down Abu Muslim's family.

Speaking from Aleppo province, Kareen said he has encountered 20 to 30 Canadians.

CBC News has anecdotal evidence of at least three Canadian deaths in Syria, but the Department of Foreign Affairs has not answered requests for official numbers.

Linked up with extremist group

The young man whose mother spoke with Arsenault had a hard time during his teenage years. There was a suicide attempt, a bipolar diagnosis, isolation, but then apparent salvation. He converted to Islam and calmed down.

"He had found somewhere where he belonged," she said.

But happiness was fleeting. Just before he turned 20, he moved into a boarding house and became secretive, angry and political.

He eventually told his mother he was leaving the country to go to Egypt to study to become an imam.

In November, he left, but didn't go to Egypt. Instead, he went to Istanbul and then Syria, where he joined up with an extremist group.

His mother would get an occasional text, but as the fighting in Syria worsened, his contact became limited and his anger grew.

"When I last talked to him he was so cold, his biggest thing was, 'Canadians are scum, we're all sinners, we're evil, we don't deserve to be on this Earth.' Where did he get that from?" asked the mother.

"Where do you get that from? My son wasn't like that. My son is gone."

CSIS, which had been tracking the young man, and others like him, has no new information on him, she said.

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  • Syrian refugee, Ahmed al Delly, 59, from Daraa in Syria, reacts as he speaks about his wife, four sons, and two daughters, who are still in Daraa but he has had no contact with them, after the prayer of Eid al-Fitr, that marks the end of the holy fasting month of Ramadan, at Zaatari Syrian refugee camp, in Mafraq, Jordan, Thursday, Aug. 8, 2013. (AP photo/Mohammad Hannon)

  • This image provided by Shaam News Network on Thursday, Aug. 22, 2013, which has been authenticated based on its contents and other AP reporting, purports to show mourners next to bodies of victims of an attack on Ghouta, Syria on Wednesday, Aug. 21, 2013. (AP Photo/Shaam News Network)

  • This image provided by by Shaam News Network on Thursday, Aug. 22, 2013, which has been authenticated based on its contents and other AP reporting, purports to show several bodies being buried in a suburb of Damascus, Syria during a funeral on Wednesday, Aug. 21, 2013. (AP Photo/Shaam News Network)

  • Columns of smoke rising from heavy shelling in the Jobar neighborhood in west Damascus, in Cairo, Syria, Thursday, Aug. 22, 2013. (AP Photo/Hassan Ammar)

  • In this citizen journalism image provided by the Media Office Of Douma City, which has been authenticated based on its contents and other AP reporting, a Syrian man mourns over a dead body after an alleged poisonous gas attack fired by regime forces, according to activists, in Douma town, Damascus, Syria on Wednesday, Aug. 21, 2013. (AP Photo/Media Office Of Douma City)

  • Syrian refugees cross into Iraq at the Peshkhabour border point in Dahuk, 260 miles (430 kilometers) northwest of Baghdad, Iraq, Tuesday, Aug. 20, 2013. (AP Photo/Hadi Mizban)

  • This citizen journalism image provided by the Local Committee of Arbeen which has been authenticated based on its contents and other AP reporting, shows a Syrian man reacts as he carries a dead body of a Syrian girl, after an alleged poisonous gas attack fired by regime forces, according to activists in Arbeen town, Damascus, Syria, Wednesday, Aug. 21, 2013. (AP Photo/Local Committee of Arbeen)

  • This citizen journalism image provided by the Local Committee of Arbeen which has been authenticated based on its contents and other AP reporting, shows Syrian citizens trying to identify dead bodies, after an alleged poisonous gas attack fired by regime forces, according to activists in Arbeen town, Damascus, Syria, Wednesday, Aug. 21, 2013. (AP Photo/Local Committee of Arbeen)

  • This citizen journalism image provided by the Local Committee of Arbeen which has been authenticated based on its contents and other AP reporting, shows dead bodies of Syrian citizens in Arbeen town, Damascus, Syria, Wednesday, Aug. 21, 2013. (AP Photo/Local Committee of Arbeen)

  • A Syrian family sits in a tent at Kawergost refugee camp in Irbil, 217 miles (350 kilometers) north of Baghdad, Iraq, Wednesday, Aug. 21, 2013. (AP Photo/Hadi Mizban)

  • Syrian refugees stand in a queue to receive free food at Kawergost refugee camp in Irbil, 217 miles (350 kilometers) north of Baghdad, Wednesday, Aug. 21, 2013. (AP Photo/Hadi Mizban)

  • Syrian refugees wait to receive a tent at Kawergost refugee camp in Irbil, 217 miles (350 kilometers) north of Baghdad, Iraq, Wednesday, Aug. 21, 2013. (AP Photo/Hadi Mizban)

  • Syrian refugees wait to receive a tent at Kawergost refugee camp in Irbil, 217 miles (350 kilometers) north of Baghdad, Iraq, Wednesday, Aug. 21, 2013. (AP Photo/Hadi Mizban)

  • Syrian refugees gather for food aid at Kawergost refugee camp in Irbil, 217 miles (350 kilometers) north of Baghdad, Iraq, Wednesday, Aug. 21, 2013. (AP Photo/Hadi Mizban)

  • Syrian refugees wait for food aid at Kawergost refugee camp in Irbil, 217 miles (350 kilometers) north of Baghdad, Iraq, Wednesday, Aug. 21, 2013. (AP Photo/Hadi Mizban)

  • A Syrian military soldier holds his AK-47 with a sticker of Syrian President Bashar Assad as he stands guard at a check point on Baghdad street, in Damascus, Syria, Wednesday, Aug. 21, 2013. (AP Photo/Hassan Ammar)

  • A Syrian military soldier holds his AK-47 with a sticker of Syrian President Bashar Assad and Arabic that reads, "Syria is fine," as he stands guard at a check point on Baghdad street, in Damascus, Syria, Wednesday, Aug. 21, 2013. (AP Photo/Hassan Ammar)

  • This citizen journalism image provided by the Local Committee of Arbeen which has been authenticated based on its contents and other AP reporting, shows a Syrian man receiving treatment, in Arbeen town, Damascus, Syria, Wednesday, Aug. 21, 2013. (AP Photo/Local Committee of Arbeen)

  • Syrian refugees cross into Iraq at the Peshkhabour border point in Dahuk, 260 miles (430 kilometers) northwest of Baghdad, Iraq, Tuesday, Aug. 20, 2013. (AP Photo/Hadi Mizban)

  • Syrian refugees cross into Iraq at the Peshkhabour border point in Dahuk, 260 miles (430 kilometers) northwest of Baghdad, Iraq, Tuesday, Aug. 20, 2013. (AP Photo/Hadi Mizban)

  • A general view of the Kawergost refugee camp in Irbil, 217 miles (350 kilometers) north of Baghdad, Iraq, Wednesday, Aug. 21, 2013. (AP Photo/Hadi Mizban)

  • In this image taken from video posted by Ugarit News, which has been authenticated based on its contents and other AP reporting, purports to show a fireball from an explosion at a weapons depot set off by rocket attacks that struck government-held districts in the central Syrian city of Homs on Thursday, Aug. 1, 2013. (AP Photo/Ugarit News via AP video)

  • Syrian refugees gather for food aid after cross into Iraq at the Peshkhabour border point in Dahuk, 260 miles (430 kilometers) northwest of Baghdad, Iraq, Tuesday, Aug. 20, 2013. (AP Photo/Hadi Mizban)

  • In this image taken from video obtained from the Shaam News Network, which has been authenticated based on its contents and other AP reporting, a Syrian man comforts a child injured by a missile strike in Raqqa, Syria, Wednesday, Aug. 7, 2013. (AP Photo/Shaam News Network via AP video)

  • Syrian refugees cross into Iraq at the Peshkhabour border point in Dahuk, 260 miles (430 kilometers) northwest of Baghdad, Iraq, Tuesday, Aug. 20, 2013. (AP Photo/Hadi Mizban)

  • In this citizen journalism Monday, Aug. 12, 2013, image provided by Aleppo Media Center AMC, which has been authenticated based on its contents and other AP reporting, buildings are seen damaged from the shelling of Syrian forces at Karm al-Jabal area in Aleppo province, Syria. (AP Photo/Aleppo Media Center, AMC)

  • In this citizen journalism Monday, Aug. 12, 2013, image provided by Aleppo Media Center AMC, which has been authenticated based on its contents and other AP reporting, Syrian rebels open fire as they battle against the Syrian forces in Aleppo, Syria. (AP Photo/Aleppo Media Center, AMC)

  • In this image released by the Syrian official news agency SANA, a Syrian army soldier stands behind his machine gun during a battle against the Syrian rebels at an unidentified location in Latakia province, Syria, Tuesday, Aug. 13, 2013. (AP Photo/SANA)

  • In this image taken from video obtained from the Shaam News Network, which has been authenticated based on its contents and other AP reporting, a Syrian man carries an injured child away from a missile strike in Raqqa, Syria, Wednesday, Aug. 7, 2013. (AP Photo/Shaam News Network via AP video)

  • In this image released by the Syrian official news agency SANA, a Syrian forces tank fires during a battle against the Syrian rebels at an unidentified location in Latakia province, Syria, Tuesday, Aug. 13, 2013. (AP Photo/SANA)

  • In this image taken from Sunday, Aug. 11, 2013, video obtained from the Sham News Network, which has been authenticated based on its contents and other AP reporting, a rebel fighter fires a gun in a valley in an unidentified location in Latakia province, Syria. (AP Photo/Sham News Network via AP video)

  • Mansour Mahameed, 26, from Daraa city in Syria, a former Free Syrian Army fighter who lost his leg last March after the Syrian troops bombing, prepares to sit for the Eid al-Fitr prayer that marks the end of the holy fasting month of Ramadan at Zaatari Syrian refugee camp in Mafraq, Jordan, Thursday, Aug. 8, 2013. (AP Photo/Mohammad Hannon)

  • Syrian refugees cross into Iraq at the Peshkhabour border point in Dahuk, 260 miles (430 kilometers) northwest of Baghdad, Iraq, Tuesday, Aug. 20, 2013. (AP Photo/Hadi Mizban)

  • In this image taken from video obtained from the Shaam News Network, which has been authenticated based on its contents and other AP reporting, a Syrian man carries an injured child away from a missile strike in Raqqa, Syria, Wednesday, Aug. 7, 2013. (AP Photo/Shaam News Network via AP video)

  • In this photo released by the Syrian official news agency SANA, dead bodies of Syrian rebels are seen on the ground, killed during ambush by Syrian forces near the Damascus suburb of Adra, Syria, Wednesday Aug. 7, 2013. (AP Photo/SANA)

  • In this image taken from video posted by Shaam News Network, which has been authenticated based on its contents and other AP reporting, purports to show a fireball from an explosion at a weapons depot set off by rocket attacks that struck government-held districts in the central Syrian city of Homs on Thursday, Aug. 1, 2013. (AP Photo/Shaam News Network via AP video)

  • This image posted on the official Facebook page of the Syrian Presidency on Thursday, Aug. 1, 2013 purports to show Syrian President Bashar Assad shaking hands with a soldier during Syrian Arab Army day in Darya, Syria. (AP Photo/Syrian Presidency via Facebook)

  • This image posted on the official Facebook page of the Syrian Presidency on Thursday, Aug. 1, 2013 purports to show Syrian President Bashar Assad walking with soldiers with during Syrian Arab Army day in Darya, Syria. (AP Photo/Syrian Presidency via Facebook)

  • In this image taken from video obtained from the Shaam News Network, which has been authenticated based on its contents and other AP reporting, a Syrian youths run away from the scene of a missile strike in Raqqa, Syria, Wednesday, Aug. 7, 2013. (AP Photo/Shaam News Network via AP video)