You don't just have people who wake up in the morning and say, "What evil things can I do today, because I'm Mr. Evil?" People do things for what they think are justified reasons. Everybody is the hero of their own story, and you have to keep that in mind. If you read a lot of history, as I do, even the worst and most monstrous people thought they were the good guys. We're all very tangled knots.
George R.R. Martin
evil, good, intentions, motives, people