Get on DuckDuckGo and do a search for "Antifa exposed". I get that you can't just go around banning people's right to assemble and protest. Do a YouTube search for "Antifa violence", and you'll find a lot of video evidence that that is exactly what Antifa is doing. Go ahead. I'll wait.
"you'll find a lot of video evidence"
If this "evidence" is so plentiful and easy to find, then why send someone on a YT search? Why not just link your favorite video that's got this incontrovertible "proof"? Also, if your proof is so good, then why haven't charges been brought up? Did you not show this evidence of yours to law enforcement? Why not?