I agree with most of what Cosby says however what does the white man have to do with it? All the blacks have to do is clean up their own act and good things will happen. Keep using the white man as a scapegoat or excuse will get them nowhere.
His point is that black men will not go to school or do other things to achieve because they "know that the white man will keep him from graduating", he says quit being afraid of the 'white man' and even if what they used as an excuse were to be true it is still not a good reason to fail.