No, not the other way around. People who came to the Milo speaking event were there to hear Milo talk. ANTIFA came to bash their heads in. There was a second event, ANTIFA attacked again. By the third round, people learned that they would be attacked. So guess what? Violence escalates and semi-militia types show up as bodyguards.
Police could stop the escalation by having ANTIFA remove their masks or by having a better body search to find the weapons. The Mayor could stop blaming Republicans when its one group that keeps comitting the violence. The 2014 riot at Berkeley? Black bloc. Must have been the republi... oh wait no, they were beating up fellow protesters.
TLDR: You know nothing Jon Snow