That's no surprise.
Even good black teachers want students who WANT to learn and are well BEHAVED. It's beyond race. It's more of a cultural issue ... for example who can forget the phrase that “that's real WHITE of you” - when someone does well or does the right thing.
At some point the black race has to do some soul searching and move beyond blaming skin color. Condi Rice, Sowell Thomas, Clarence Thomas all went through ugly name calling like being an “Uncle Tom” etc.. They were accused of “selling out” to the “whites”. Why? Because they are accomplished. There seems to be a DOWNWARD push on blacks to STAY DOWN and that since that is what the racists, Sharptons, and Wrights WANT OF THEM.