I don't get why they called it a riot, it was a bunch of people standing around a fire. Things only picked up when cop decided to shut it down.
Cops actually didn't start it. A big fire means the fire department was called. Fire department showed up just to get hit by beer bottles and anything possible THEN the fire department called the police, then the cops in riot gear came. So, the police did not initiate anything, the idiots who thought it would be a good idea to throw shit at the fire department started the whole thing.