I don't know much about this particular case, but in general things are worse that even what you described.
If anyone (even a black) disagrees with the black liberal elite, that person is a racist. Against raising taxes? You are a racist. Favor charter schools? You are a racist.
This corrupts our society, shuts down free speech, and because of the boy-who-cried-wolf effect, actually hides true racism.
If we allow liberals to play the racist card without confronting them they will continue to do so. If we force them to define racism with a simple question we can expose the absence of logic in their conclusion.
How can a person be racist if they greatly admire some blacks but disapprove of others? Their opinion "must" be formed by another factor besides race. We cannot win this debate by playing on defense. We must attack liberals with logic:
Racism: All blacks are stupid. John is Black therefore John must be stupid.
Not Racist: Some blacks are smart and some blacks are stupid. John is Black therefore John could be smart "or" stupid. (Our determination of John's intelligence cannot be determined by his race. We must judge John on another factor.)
If a black disagrees with the liberal black elite, they are an “Uncle Tom.”