Magatsu has a more defined sense of morals and ethics than most BotI characters, which is one of the things that makes him about the most awesome thing ever. He's growing up, which means he's starting to figure out that hatred doesn't get you anywhere, but he's spent so much time being ruled by it that it's opening a big hole in him and he doesn't have anything to fill it up with yet.

So true. I'd say "poor Magatsu", but meh. I have confidence that he will find his way eventually, provided Samura lets him stay alive.