Left wing violence is not really a thing.
The exact opposite of the truth. A quick search of the term AntiFa on Youtube would throw up numerous examples. So would reading the history of the Russian Revolution, the FARC, the Red Brigades, I could go on but you get the idea. In this very thread we see people advocating for left wing political activists to 'punch nazis' (whoever they might deem to be nazis today). What is that if not left wing violence?
After you Google AntiFa you should google Fascism and remember what we need those punches for.
And then you should google AntiFa again and remember that the only appropriate place for such people is in a prison cell.