McInnes criticized the ban in an email Wednesday, saying it was a way to drum up “hysteria” prior to the midterm elections next week.
WATCH: Scuffle breaks out after far-right Proud Boys speech in New York City
“The left knows they are going to lose this election so they are ramping up the hysteria with fake news and censorship in a last ditch effort to win,” he said.
The Southern Poverty Law Center calls the all-male Proud Boys a hate group, but the Proud Boys reject the label and describe themselves as “Western chauvinists who refuse to apologize for creating the modern world.”
Members of the group brawled with anti-fascist protesters following a speech by McInnes at a Manhattan Republican club on Oct. 12, resulting in arrests of both Proud Boys’ members and anti-fascists.
New York Gov. Andrew Cuomo, a Democrat, criticized the statewide Republican Party for inviting McInnes.
A spokeswoman for Facebook, which also owns Instagram, said in a statement, “Our team continues to study trends in organized hate and hate speech and works with partners to better understand hate organizations as they evolve.”
The loss of the platforms will likely hurt the Proud Boys’ ability to recruit. The Southern Poverty Law Center reported in August that regional Proud Boys chapters were vetting new members through private Facebook chatrooms.
When asked Wednesday if the social media platforms have been a major recruiting tool, McInnes said, “I guess.”
McInnes, 48, was a co-founder of Vice Media but left the company in 2008. He now hosts a podcast called “Get Off My Lawn.”