You're right that they ignore the science and the facts, that's why they're holding the positions they hold (climate change denialism, prohibition of abortion and gender reassignment, austerity policy, etc.) The problem IMO isn't so much with the individuals as it is with the propaganda apparatus. It's clear that people can be indoctrinated into such things, and much worse actually (see nazism), so instead of focusing on whether the individuals are arguing from bad faith or not, I'd rather blame the propaganda apparatus that turns them into ghoul, and not just blame it but put the focus onto it.