Black humor has always been crass, politically-incorrect, and filled with profanity and sex. Cosby is right on this issue but he needs to leave the other comedians alone. People like Chris Tucker and Eddie Murphy in the 80s and Pryor and Redd Foxx in the 70s were DA BOMB! Even Cosby himself used to be a bad-ass. Rent Murphy's "Raw" and see him rake Cosby over the coals with that voice of his. LOL
Fools don't know the difference between vulgarity and humor. Eddie Murphy can be and often is hilarious without being vulgar. Vulgarity is to comedy what sleaziness is to pop music. It isn't the product, it is the marketing that sells the product.
Explain Sinbad, then.