meself, and others:

I had heard about Dave Chappelle's "Blind Supremacy" sketch. However, I've never seen it, and had forgotten about it when I wrote my comment to this thread.

Here's an excerpt from a newspaper article that mentions that sketch. Ironically, the article is from the Pittsburgh Post Gazette {my adopted hometown}. Fwiw, the columnist is African American:

"The infamous "Blind Supremacy" sketch from last season comes to mind. No one who saw it will ever forget the conceit of a blind Klansman, played by an obviously black, but hooded Chappelle, rallying his followers with cheers of "White Power."

The faux supremacist has made a minor fortune making speeches at racist gatherings. Still, he doesn't know that he's black because he's never seen himself in the mirror. The childhood buddy who chauffeurs him in a pickup truck won't level with him because he's afraid it could kill the golden goose of fiery anti-black rhetoric. As long as he stays hooded, the suckers who pay to hear him preach aren't the wiser, either.

When the blind Klansman rips the hood from his head in response to the crowd's entreaties to "show his face," all hell breaks loose.

Later, we learn from the skit's narrator that the blind Klansman eventually divorced his white wife because he couldn't tolerate being married to "a n***er lover".*"

The hilariously dangerous world of Dave Chappelle
Tuesday, January 27, 2004; Pittsburgh Post Gazette; Tony Norman

http://www.post-gazette.com/columnists/20040127normanp5.asp

*Yes Tony Norman wrote that entire N word. Yes I cringed when I read it. And yes I took the liberty of refusing to write the entire word.