I've only seen you do so lately.
I think the reason many didn't see antifa for what they are is the media misrepresented and defended them for a long time.
Their political views are on the left. They're communists, anarchists only in the sense of creating chaos in the social order so they can rush in to fill the void.
Republicans--the right generally--does denounce racists. Trump denounces them, as well as antifa, in Charleston. I think we need to be careful not to conflate nationalism with racism.