Whites are offended every day. Just turn on the TV and you'll see offensive speech. I cringe every time I hear "white people have no rhythm". How about the classic movie "white men can't jump"? White men are the target of choice for every racist out there. Al Sharpton said that people weren't helped in New Orleans because of their color, which infered that all whites responding to the disaster are racists. THAT is offensive. THAT is personal. Should Al Sharpton be punched and "expect" it?
The same people out there crying about free speech won't rear their heads over this one. The ACLU was behind the kid with the "bush is a terrorist" shirt before he left the school grounds- where are they now?
This story illustrates how we have been trained to respond differently to similar situations. I feel sorry for the white kid and the black kid. They both showed stupidity and they both reinforced their own beliefs in the other.
Proportionality is everything. "White people have no rhythm" is quite a bit less extreme than "I'm going to urge folks to tie nooses around the necks of white people and drag them behind pickup trucks."
You should address the whites who created the movie and consider the ironic intentions of the movie since the best ball player in it is the white guy.