They get into holy wars, break stuff, and take action regularly. So there goes three reasons. What they will do is call people idiots or lazy if they complain about poor UX. Or remind them how you only do (arcane steps here) to accomplish the task so why the fuss?

It's hard to absolutely prove elitism over all other things that go on in a person's head. However, that kind of behavior resembles elitism. Hell, many such people even made memes like "Elitist Linux Asshat" to rub others' noses in it. Starts to get harder to deny their ego and aire of superiority is involved at that point.