I've said this before (and dead0man always ignores it), but here's something many miss: It is possible to think Trump is a Horrible Person and yet still enjoy the nightmare he's causing for the Republicans.
Except NONE of the Trumpettes are saying that. At least not the ones we're suffering through. We have given them many opportunities to take this (still low class) route, and they've always denied it.
That said, I actually agree with you. Most of these clowns are only doing it to cause havoc in the political party they don't like. But since they won't admit it, we take them at their word. Their word is that a racist, bigot, sexist, moron, asshole is the best choice for President. We're making fun of that. Why wouldn't we? It's fun and easy, who doesn't love fun and easy.
If they don't want to be made fun of for being racist idiots, they can admit the real reason and just be assholes instead of racist assholes.