Vaush is right when he says MAGA die-hards are moral black holes. I wasn't raised in a white rural family, but I have a similar experience.
I have a relative born in China that immigrated to America. I've had repeated arguments with them over their Republican views and worship of Trump.
In one argument, I got this relative to admit that they don't really care if climate changes raises the sea levels, displaces Floridan Republicans, destroys their homes with floods, and ruins their lives. To them, Floridan Republicans are this abstract group that live in a far-off place that doesn't matter to their immediate self-interest.
I was left gobsmacked, that I, a leftist that absolutely hates what Republicans are doing the world, ended up caring more about the self-interest of Floridan Republicans, than another Republican, who should be their political ally.
Over the course of several arguments, I've managed to whittle down what I think is their core beliefs:
Trump is God and is the only competent leader able to fix everything wrong with their quality of life.
Anyone that I can't see and doesn't directly affect my life in the short-term does not matter. They can just die for my comfort.
Still, calling these a set of principles is debatable. When arguing with them, they never engage with my ideas, my arguments at all. They just immediately get mad and start repeating an irrelevant talking point like how bicycling lanes are ruining everything.
It's not ignorance. That doesn't fully capture what's going on. It's as Vaush says, it's anti-empiricism. Their brain fundamentally doesn't engage with principles, logic, or morality.
This relative was raised in China, during the famine of Mao's rule. If I had to take a guess, living in that hardship where people had to literally eat grass may have broken this relative's brain, leading them to act in this utterly selfish and self-serving way. Although they claim they like democracy, their view of what the purpose of democracy is, is for all selfish people to fight each other to grab what they can for their self-interest. My relative does not vote to better society, but to see what benefits they can get this election. This is an anti-civil mindset that corrodes democracy.
White ruralness isn't an essential part of MAGA diehard beliefs, although that environment is one way to breed this mindset. Here is an immigrant from Maoist China, who basically acts exactly as if they were a white rural American in a ruby red state saturated with Fox News.
What underlies the MAGA mindset appears to be a belief that the world is unfair and we can't do anything to fix it, so the only thing you can do is to loot what you can and be the predator that eats the losers. It's anti-civil, anti-empiricist, anti-humanity.