I forgot the boston bombers who I guess could be labelled left wingers.
They were Chechen nationalists who might be considered Muslim terrorists but not leftists at all. "Leftist" is a concept; terror bombing is a strategy employed by nationalists --as in IRA bombings.
Afa the Trump hat, from what I've read, the Pittsburgh shooter did not approve of Trump because he had too many Jews (like Jared) around him. It's the old nazi shtick.
I happened to turn on FOX , and the reporter was clear to stress that it was a "conservative" area of Pittsburgh. She didn't finish with "Jewish".
Before the guy in the Trump van was caught, the first thing I heard on FOX was that it was probably a "false flag" operation because of the way the devices were made.
Well, I wouldn't be surprised if there's some type of event or claim of conspiracy soon.