Anti-Fascist. They exist primarily in Europe where they usually attack “fascists” and burn stuff to the ground. Their ideology explicitly advocates mass violence to suppress opponents, working on the theory that that’s the only way to win against a Nazi movement. (Which is stupid, because Hitler’s party developed a paramilitary more dangerous than the thuggish-communists who used to throw beer bottles and assault normal people in the streets.) ANTIFA appears to have become very popular and very big all of a sudden here in the USA.
There was a large group of out of work “occupiers” looking for the next paycheck.