The Alt-Right Playboook: Always A Bigger Fish explains that conservatives have a strong preference of hierarchy and order. They have this preference even if they are low on the hierarchy. They reason that maybe they themselves didn’t work hard enough, weren’t smart enough, or whatever, so don’t deserve to be higher up. They gain a sort of comfort from “knowing their place.” Those lower than them on the hierarchy deserve even less.

I think this explanation is spot-on, and is more or less true for every “conservative” I’ve known. I suppose fascism also has this love of hierarchy, which is what the Republican party really is now (or, at least, very similar to it).