> I understand that people from the countryside can be seen as kinder towards people they like but my impression is that hatred and prejudice is much more prevalent there...
That's not my experience at all. I dealt with more overt racism in NYC than any tiny red state town, and I've spent plenty of time in both. There are racist people everywhere, but even in rural areas, they tend to be ignorant and antisocial so they are not really in any position to oppress anyone.
People tend to mistake talking heads on TV for actual people. People also tend to mistake voting patterns for personal quality of character. There's a caricature on TV (a bigoted one IMO) that small towns are full of shirtless racist rednecks that throw beer cans at all minorities that wander in town. That's because it's a useful trope and an easy way to advance a narrative. Every all town church I'm aware of sends missionaries overseas to build schools, wells, etc. That doesn't mesh with the "we hate foreigners" narrative. I had dinner in a tiny red state town last week. The most popular place in town is run by Mexican immigrants. And it's thriving. Life is more complicated than most media lets on.
Even if we narrowed everything down to political views, the traditional red state view is that diversity in government (federalism) provides better prosperity, diversity, justice, freedom, and so on. Most red state types are fine leaving Colorado with its marijuana and Nevada with its brothels. They value the ability to self determine more than they value the ability to control other people.