Yeah I'm in a similar space as a Canadian. Stayed relatively offline until a couple hours ago and now it's official lol. I empathize with your growing sense of detachment from American politics and what helped me come to grips with that is recently is learning that America has the most frequent elections of any country in the whole world. It's baked into their culture. They go through this cycle every 4 years like clockwork, as their constitution mandates.
The reactions both before and after the 2016 one were EXACTLY like this. Same talking points, same willful ignorance of all the horrible bullshit the incumbent dem admin did like Biden blowing up Nordstream, helping complete the border wall, deliberately stalling/defusing 1/6 investigations, aiding and abetting the Palestinian genocide, stoking the Ukraine war, shrugging at all the SCOTUS rulings rather than just packing it like the GOP did...
It's just going to be so painful and cringe to see all their fantasies about muh concentration camps and cancelled elections not come true and see them do all of this AGAIN in 2028, probably with fucking Kumla again.
I guess to get to your concern, if you're being unempathetic than I definitely am too for whatever that is worth. I used to be willing to live and let live for americans who voted for whomever because I didn't see meaningful difference and because I thought they were simply misled, but after being personally insulted and attacked and sneered at by Americans who tell you to butt out as a non-American when you stop toeing the DNC line, I kind of just said fuck 'em. I think they deliberately make the choice of "genocide over there vs over here" and dress it up with pride stickers and memes and twitter posts and Parks & Rec screenshots to make themselves feel better about only giving a shit about American lives. I'm just emotionally divesting from American politics and focusing on things that can actually help prepare me. It helps to remember that they do this every 2 goddamn years and it's not the end of the world.
anti-fascism IS just a vibe to them but fascism itself is too, I would argue lol. According to them fascism is when you say mean things about minorities on twitter and complain about woke, definitely has nothing to do with imperial shrinkage and what happens when empires run out of gas. This cycle has taught me just how little the american voter gives a fuck about geopolitics. They themselves will often tell you with a smile how they only really care about domestic politics (AKA what they personally stand to gain from imperialism).