The views they disagree with are fascist views so yes duh. they are literally anti-fascists. Have you any examples of them opposing any views which aren't fascist, violently or otherwise? We should oppose that.
I'm not sure if you're trolling or not at this point. Nothing antifa has protested is actually fascist. Just calling everyone you oppose a facist or nazi to justify your actions doesn't make it true. Look up a definition of facism other than google / wikipedias and you'll see what I mean.
Attacking free speech rallies is terrorism, not "fighting fascism". In fact, the US Dept of Homeland Security already categorized them as a domestic terrorist group in 2016.
http://www.weeklystandard.com/a-beating-in-berkeley/article/...