Because it's not about liking it, it's about how it hurts the "bad people". If you told one of them that cutting their left arm off would hurt the Dems, they'd bleed out with a smile.
They blindly believe Trump is hurting the ones who "deserve" to be hurt. If it ends up burning them, too, oh well. They'll get better because they're the "correct" ones, and they'll stick to it until they die.