I don't recall the American left of 10 years ago being this self-righteous and willfully ignorant.
Welcome to hyperpartianship, and yeah, this level of discourse is relatively new.
Libs have been calling Conservative Evangelical Republicans jackbooted fascist thugs since the 70s, and probably earlier. The only thing that has changed now is that it has way more publicity and incidents of stuff happening travel in minutes rather than hours, days or weeks into the political zeitgeist. Which is why you get so much hyperbole and entrenched stupidity, because no one has any time to craft a response before one is expected of them. So they say the dumbest, most visceral thing they're feeling at the moment and, surprise, it turns into a shit storm of low-quality facts, if any, and indefensible positions they now must defend to the death.
Everyone believes what's happening in their era is novel. It's not. The political left and right have always hated each other in America. You think today's discourse is inflammatory? Check out what the left and right were saying about each other up to and during the Civil War.
If they're doing nothing but act as security, they're all utterly interchangeable in the eyes of the law. It doesn't and it shouldn't matter how brown or tie dyed their shirts are.
Now, show of hands. Who actually expects them to act professionally when they're being placed in front of people who politically are their mortal enemies and who are guaranteed to bait them if not outright attack them? The most powerful man in the world goes to a private security firm rather than, I dunno, the secret service, local law enforcement or any of the dozens of not-inflammatory choices at his disposal?
He wants incidents. He wants violence. He wants ugliness. They're fuel for the narrative he's building about why he can't get anything done. Say what you will about freedom of speech, tolerance, whatever......shouting fire in a crowded movie theater is not considered protected speech. And this toes the line, by effectively holding a film festival about arson, daring convicted arsons to show up and then soaking gasoline into the carpet for good measure. And it's even less ethically sound than those "Draw Mohammed" events.