That seems to be a pretty good example of the hysterical position of the radical left. Checks all the emotional boxes: People of color, law enforcement, refugees, children, and the perennial favorite boogeymen: racists, and now white supremacists. (You forgot "literal Nazis.") Even down to putting quotes around 'side' - presumably to punctuate your point that those who disagree with you don't have a legitimate perspective.

The right has plenty of problems (plenty!) but the what seems to be unique to the left (or at least much more prevalent/vocal) is this Sith-like perspective that anyone who disagrees (or even just agrees less than 110%) is some kind of immoral/evil opponent for whom no type or amount of righteous retaliation is undeserved.

But of course that might just be be how it looks from the perspective of a "smug, ignorant centris[t]."

I'm not sure how you can claim this attitude is somehow unique to the left when there's a president who does this exact thing on a daily basis. You would have to be deliberately ignoring the things that he says and supports (along with the party that enables him) which, well, I guess would support your tagline after all.

The idea that the citizens of the United States are somehow responsible for what their illegitimate government does is ridiculous. The people who actually will have to physically coexist with the refugees and the people responsible for their plight in the first place are not the same, the refugees will live around normal poor or middle class people who do not make major foreign policy decisions and the latter will live in rich gated neighborhoods in expensive houses and will probably never set eyes on a refugee in their lives. Whether it's in the interests of the natives to let in so many people who have a legitimate reason to hate the country they are moving to is also something to consider, this being supposedly the only real concern of government after all.