St Tom was his mentor, correct? Then I agree he had no mentor. I don't argue that hes a suit, frankly I think most ADs are.
It doesn't take a genius, or even an imbecile to see that a change is beyond necessary now. The fact that you seem concerned with the "fallout" of firing an AA coach is disturbing, at a minimum.
The color of one's skin should play no more role in one's consideration for a position, than it should in one's consideration to be terminated from it. Right is right, and hiring, firing, or not firing him because of it are all equal mistakes.