Is the movie Babel racist?

I know, I just saw a movie that has been around a while, but what struck me is that all the white characters were morally blameless. Crap happened to them, but mostly they were righteous. They hit that Brad cheated, but very distantly so as if not at all. Meanwhile, the other characters screw up bad, or make bad moral choices. Just confused, because I don't see this stated on the net, and wouldn't expect it given who the writer and director are.