RE: "us vs. them mentality".
I'm not surprised the cops would have an us-vs.-them mentality. There was is a very clear anti-cop campaign going on... ACAB/"all cops are bastards" graffiti? Flaming torch march in front of a precinct building?
Distinctly an us-vs.-them mentality.

Am I?

I don't know, anyone up here from Portland?

Those are the jerks you should be worried about.

Why is it when radicals rampage it is almost always middle class people who get hurt?

From the Weathermen to the Boston Bombers, the victims are accountants, baristas and shop clerks.