I don't think Bush is a racist per se, like a KKK one. But there was this time when he met our president and asked if we also had "black people" (look I'm not sure what term he used, but it was a political correct one) in Brazil. Our president was literally speechless.
He is misinformed probably, but not really a racist.
I've seen this issue not of white and black people thing, but a rich and poor people thing. Poor people were left behind, there were white folks there too. It's not a race thing at all.