Is that the same as a Black Supremacist??
No, it is a belief that if a person of ones own race does something wrong to a person of another race, you must protect and defend them even if it means lying under oath, because race loyalty is more important than the truth or the rule of law fairly applied.
This terrible attitude was once common in Democrat regions among white persons toward blacks, and still may happen at times, although whites have made great efforts to eradicate this type of racism. Now its turnabout time among some blacks, and this upstanding black official is getting a faceful. As he says, its disappointing.