I wouldn't call Antifa's methods fascist methods but they definitely use violence against many who don't think like them, have no problems to destroy people's belongings (shops, cars and so on) even if these people did nothing to anyone, release names of some to the public to label them as something specific, like to use their look and behavior in groups to spread fear and appear dangerous and so on...
But it's not a secret that the extremes (which Antifa is obviously) are often similar in many things even if their ideology is the complete opposite.
They both don't really scream "we have only good in mind" in the eye of an average person who doesn't belong to one of both extremes. I would say most people kinda fear both groups if they see them in their city (at least here, not really sure how Antifa groups behave in every single country)