Yeah . . . she's never actually left the Fire Nation; unlike Zuko, she's never actually seen the world, seen what it's like out there, seen what her country is doing. I can see how she'd feel that way -- being raised in the ruling class, weaned on propaganda when even her grandparents wouldn't remember a time when the Fire Nation was on its way to becoming the greatest -- the only -- nation on earth. Understandable, sympathetic in a way, but not someone who's really best for the position of power she'd have as the Fire Lord's wife. She wouldn't consider him a traitor now -- he's clearly working for the best interests of the people -- but I feel there'd still be a part of her that believed the basics of the propaganda.

Katara, he can trust with his life. He can trust her to do the right thing, even if her emotions are elsewhere. Your icon? She grabbed him and pulled him to safety even when she still pretty much hated him. And now . . . she'll even pull him into the group hugs.