Minassian is also facing 10 first-degree murder charges after he allegedly plowed a van into pedestrians on a busy Toronto street.
Thousands of people attended the vigil Sunday night.
Several established conspiracy subcultures jumped at an opportunity to push media-discrediting agendas.
Minassian, 25, has been described as intensely socially awkward and has been connected to an incredibly misogynistic online group.
ISIS has claimed that the New York terror suspect is a “soldier of the Caliphate” even though investigators have so far found no evidence of a direct link to the terror group.