The Righteous Mind by Jonathon Haidt opens with the moral, psychological explanation of this phenomenon: the brain judges first, and explains later. Often times

The Righteous Mind by Jonathon Haidt opens with the moral, psychological explanation of this phenomenon: the brain judges first, and explains later. Often times the reasons do not make much sense. It is some sub-rational decision making process which is more fundamental with which divine introspection (though Haidt remains drier than this as far as I’ve read) may illuminate. Evolutionarily, the need to make simple decisions about survival quickly and consistently, suffering the minor hardships of obtuse thinking, makes perfect sense - whether you knew it or not.