They’re not actually in a lot of pain. Their struggles with poverty and drugs aren’t fundamentally different than those of the left.
What they actually are is secretly hateful and bigoted, and those beliefs are deeply rooted cultural beliefs for them. Trump just made it socially acceptable for them to be openly hateful like they’ve wanted to be for so long, and gave them the promises of fulfilling their white nationalist dreams, so they jumped all over his dick.
It’s not actually that complicated. I had the misfortune of growing up around their ilk, and have rolled with them for two years because of the lockdowns, so I know the score.