As I said in my previous comment (which you apparently didn't read), I dislike all intolerant violent groups. That includes Antifa which some people here seem to be comfortable allowing in the stadium because their politics are not "right wing." That's a slippery slope that makes it easy for other people to justify allowing other violent groups in the stadium because they share their political views.
As for the history of fascism, you may be uncomfortable with it but facts are stubborn things. Mussolini started it and mussolini was socialist. Your point about hitler is absolutely correct but also not relevant (my fault - my comment about him wasn't particualrly clear and open to misinterpretation). That doesn't mean socialists support fascism any more than any "right wing" person would support all groups or people on the right wing. It's just not that simple.
Coming full circle, this is why I'be said discussing politics in the context of this forum is problematic. Too many people here are making sweeping generalizations that are inappropriately inclusive of people or misrepresent their views. The minute you introduce words like "right-wing" into the conversation about fascism you are lumping in a whole lot of people that you shouldn't.
And saying that one violent group should be tolerated because they aren't "right wing" is absurd. You want to fight the fascists? I'll lead the charge with you. But not in our damn stadium.
Bottom line- Violent groups shouldn't be embraced regardless of their politics.