A Florida man who called himself the Antifa hunter as he waged an online campaign to terrorize and harass those who opposed his white supremacist ideology was sentenced to more than three years in prison Monday. McMahon also admitted that he threatened to sexually assault the young autistic daughter of a woman who protested against white nationalists. He called himself the Antifa hunter," a reference to anti-fascist, leftist militant activists who confront or resist neo-Nazis and white supremacists at demonstrations. McMahon called for using a diversity of tactics against Gathers, which authorities interpreted as a euphemism for violence. All told, prosecutors said, McMahon compiled 35 gigabytes of data that he could "weaponize" against his targets.