I'm going to have disagree with you. You can't just yell sexist or racist because some one believes that the Doctors character is essentially a white male.

IMHO the Doctor is male and white, and should remain that way. That isn't to say that a black woman couldn't (or wouldn't) be great a Doctor, but the Character is what he is, you shouldn't just chuck out 30 years of back story on a whim. It would seem that your advocating change for the sake of change.