Wood Buffalo RCMP say several individuals in Fort McMurray were subjected to extreme political views on topics that included immigration laws.
The individuals were either attacked verbally or contacted in a letter.
Police say their investigation took several months and included alleged incidents going back several years.
Brad Love, who is 54, has been charged with criminal harassment, mailing obscene matter and making harassing telephone calls.
Love has been release from custody on bail and is to appear in court May 27.
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