Two things:
1) Single white guy likely doesn't give a shit about Putin, Danish sovereignty or the jailing of DOJ lawyers (he voted for Trump after all);
2) Single white guy is a "macro credit strategy book at a hedge fund" manager; thus it's likely that his gripe with Trump is about all the tariff bullshit currently ongoing... and Trump 100% said he'd impose tariffs.
Even if I'm wrong about single white guy's voting remorse, my premise remains - Trump promised to do most of the shit he's now doing and as for the rest, promise or no, there were numerous ample warnings that Trump would proceed in this direction. And as a "macro credit strategy book at a hedge fund" manager, single white guy is likely way above average intelligence and education - presumably able to draw valid inferences on future outcomes based on previous events.
So I conclude - single white guy is a fucking kool-aid drinker, now that the poison begins to seep in, belatedly regrets his choice of beverage. Idiot!