Have they heard his song "They ain't makin' Jews Like Jesus Anymore"? It is replete with derogatory ethnic terms, including the "N" word. Its point is, however, to make fun of rednecks--and Greeks.
I haven't heard it. However,in the "joke" they keep playing the except from he is playing the character of the bigot redneck. But context never matters because most of our folks are too dumb to know the difference anyway. Yes, I'm that cynical.