Well, Will was saying that Reynolds said, If you think I'm conservative, you should come with me to a black barbershop. I'm usually the most liberal person there," where cultural conservatism - on crime, welfare, abortion, schools - flourishes.
Besides the fact that that is total B.S., Will is coopting Reynolds words to lend legitimacy. Everyone knows that when a Black person talks about crime, welfare, and schools, we may say "Black folk", but mean "some folk that are Black". But when white people (and Black conservatives) say "Black folk", they mean ALL Black folk.