I'm curious how it's insulting to assume that biracial people are conflicted/have issues. Even if the person doesn't let it get to him, he often has to go through a lot of prejudice from both sides. Case and point: white people call Obama black, but then there are black people who say Obama isn't "black enough" for them. I would think that kind of exclusionary torture that people put biracial people through must have some kind of detrimental effect on a person's outlook.
I'm not an Obama supporter, but I feel sorry for him that both sides aren't doing him any favors. He's both black and white and should be accepted into both circles.