So, why is a fascist mob claiming to be "anti-fascist?" What's their main malfunction? Can't they see the contradiction? If you're asking this question — and many outraged people are — you're missing what is really going on.
Ask this, instead:
Do these "protesters" even know what fascism is? No, how could they? They are in their twenties. Fascism is just a media image. A legend. An ancient myth of something that happened more than a half-century before they were born. You might as well invoke Pancho Villa's raiders or the Athenian League, for all they know.