What's weird is that both schools are both predominantly white and wealthy. Flower Mound is a suburban wasteland of upper-middle class folks mixed with old farmers being driven out by the aforementioned upper-middle class, and Plano is upper-middle class folks slowly being driven out by rich folks. FM is 80% white(3% black) while Plano is 66% white(7% black). Plano is rated one of the best cities to live in nationally due to its wealth, job market, and the fact that they have the best damned Mexican food place in the metroplex (El Norte!)
You usually see this sort of thing involving the rich white folks shitting on the poor black folks, instead of the other way around. Plenty of racists around, both young and old, though.