I see a difference here. Where there appears to be a large correlation between Extreme Pride, both black and white and racism. I don't see the correlation with an individuals pride in themselves and their heritage and racism. Where the later is a personal approach to self understanding and individual growth. Where the first is usually a result of group activity and a responce to an outside stimulus of some form.
I'm thinking along the lines that the majority population. Feel a threat to the status quo then minorities start to show self expression, pride and and desire to achieve greater things. The response to this threat may be innate in nature or a simple dislike for change.
What ever it is. People are going to have to make a conscious effort to change the way they think. This hatred for those who are different and those that choose to be different is slowly demeaning us as a people. With our level of intellegence we should not be tolerating this type of response to others.