I know the sort of protests that have been going on in Portland over the past few months, and this doesn't resemble any of them. Those protests had thousands of people, this one had approximately two hundred. Those encouraged livestreamers to show up and cover the events, both for publicity and protection against police malfeasance, in this one, people were forbidden to record the events, and those bystanders who tried to were attacked.

I'm not saying this was a group of right-wingers in disguise, but it wouldn't surprise me to learn that those on the right set this whole thing in motion and publicized it, knowing that it would attract those on the radical fringe with a tendency to be violent.