Oh, lots of things. "Suspension of moral disbelief," I suppose, causes me to rage the hardest inside, though I rarely get in arguments over it. There's too much inferential distance to close before people change from defense/rationalization mode to actually-goddamn-thinking-about-it mode. So I don't generally go about to my family members screaming "YOUR GOD CONDONES RAPE!" even though every time I hear an argument about how morality comes from god, my blood boils.