Mostly (and this is probably true for over 60% of Republicans), it’s about defunding half of the government programs they rely on but don’t realize it, sold to them through the euphemism of “tax cuts”.
I think the right to control women is next on the list, but even then we see that even republican public opinion on abortions is stricter than the left’s, but would actually prefer less extreme laws than what has been passed.
As much of a meme as it is, most rural religious folk aren’t militant about marrying children and burning crosses. We hear about every instance of child marriage cause it sucks so much, and people have been openly, violently racist despite the law for centuries, all it takes is a town full of like-minded people.