It’s not difficult to locate video footage, or testimonials from victims who’ve come face to face with mobs in masks, wielding weapons, intimidating, threatening and harassing people in the name of their ideology. They’re a global movement, have their own flag, wear a uniform, carefully manage their image via mass media, are well organized, sizably funded, and having been openly supported, on occasion, by politician and celebrity alike, have political clout. 

Their tendency towards violence is well established.