One thing I've gotten from aging is that people are people and that doesn't clean up into a happy simple duality. People you do NOT LIKE deserve dignity, comfort, and hope. You have to remember the personhood of people who are enemies, who have destroyed your identity and future and hopes and who seem hell-bent on doing it worse. You have to remember it's worthwhile fighting for stuff alongside allies who can seriously step on your toes, because people work that way.
That sort of thing.