Ankie Spitzer took the podium during the service for the 11 athletes and officials killed in a terrorist attack and pointedly directed her remarks to International Olympic Committee head Jacques Rogge, who had spoken only moments earlier.
"Shame on you IOC, because you have forgotten 11 members of the Olympic family," she said in a voice laden with passion.
Saying the IOC was discriminating against the Israelis because of their Jewish faith, Spitzer insisted the dead deserved to be honoured as Olympians in an Olympic context and not in the various places where memorials have been held, including Monday's event at London's Guildhall.
"You owe it to them," she declared.
The remarks punctuated an otherwise solemn event attended by several members of the British leadership and senior members of the country's Jewish community.
The proposal for a moment of silence has been controversial, with family members saying Olympic officials have made excuses for 40 years as to why it should not be held. The IOC has argued that the opening ceremony isn't an appropriate forum for a moment of silence.
But Spitzer pointed out that this year's ceremony included not one but two moments of silence and demanded to know why it was appropriate to offer thoughts in memory of others but not the slain Israelis.
"Is the IOC only interested in power and money?" Spitzer asked, saying the world Olympic body has forgotten that it was supposed to be dedicated to peace, brotherhood and fair play.
Just before the memorial, sponsored the British Jewish community, Prime Minister David Cameron expressed support for the effort to honour the slain Israelis.
"As the world comes together in London to celebrate the games and the values it represents, it is right that we should stop and remember the 11 Israeli athletes who so tragically lost their lives when those values came under attack in Munich 40 years ago," Cameron told an audience prior to the main memorial service. "It was a truly shocking act of evil. A crime against the Jewish people. A crime against humanity. A crime the world must never forget."
The Munich Olympics were meant to right an historical wrong. They were the first held in Germany since the 1936 Berlin Olympics, which were tainted by images of Nazism. But the Black September Palestinian militant group penetrated the laxly secured athletes village and took Israeli team members hostage. Eleven died at the village or in a botched rescue attempt.
The games were briefly suspended, but the Olympics were forever changed. Security costs soared and keep rising with every games.
A committee started by a Jewish organization in Rockland, New York, has gathered more than 100,000 signatures for the moment of silence at an opening ceremony and counts President Barack Obama among its supporters.
The families reject the official reasons they've been given for why this cannot happen. At Montreal in 1976, they said they were told the reason was that the Arabs would leave. At Barcelona in 1992, it was an unwillingness to bring politics into the games. At Atlanta in 1996, the reason was protocol. At Athens in 2004, organizers said it was not the appropriate time.
Cameron said Britain, too, had suffered at the hands of terrorists, recalling the transit attacks on July 7, 2005, that killed 52 commuters the day after Britain was chosen to stage the 2012 Olympics.
Cameron noted that Britain's "euphoria at winning the right to host these Olympics was brutally shattered within just 24 hours."
"But our two countries, Britain and Israel, share the same determination to fight terrorism and to ensure that these evil deeds will never win," he said.
"Seven years on from 7/7, I am proud that as we speak, this great city of London, probably the most diverse city in the world, is hosting athletes from 204 nations. And I am delighted that a strong Israeli team is among them," he added.
Danica Kirka can be reached at http://twitter.com/DanicaKirkaSuggest a correction