Here is what Noam Chomsky had to say about AntiFa...
http://www.washingtonexaminer.com/noam-chomsky-antifa-is-a-major-gift-to-the-right/article/2631786
These arguments have been going on for decades. Who's the real enemy (lumpen skinheads or the rich corporate guys in suits?), what's the right way to oppose them, etc?
Back then there was always a suspicion that some of the anti-fascist types were like political football hooligans, engaging in ritualised punch-ups with the other lot after which both sides would retire to neighbouring pubs (or even the same pub but in different bars) to drink and compare wounds. As well as those who suggested that focussing entirely on the lumpen skinheads was neglecting the bigger political/economic issue.
But there still isn't an equivalence between fascists and non-fascists.