It has become apparent that Americans lack a thing called common sense, you want to protest more power to ya, but think before you act. Maybe next he will head down to the hood like this
At the point they invade others space, climb on their vehicles, block traffic, etc; they are no longer just protesting. I'm sure the guy well earned the physical assault that came his way. He thought he could go in there and infringe on other people's rights without consequence and he found out he was wrong.
