I found this a while ago. I don't know why, but I found it extremely funny, not as a joke, but as one of the worst attempts at a racist joke I've ever read. There is overt racism and the author must have written it either in jail or on the wall of his padded cell with his own feces.
I really don't know what else to say. Its just that fucked up. You have been warned...
Two families were having dinner together. One family was white and the other was black. During the middle of the meal, the black father looks at white father and then jumps across the table and strangles him. After it is confirmed that he is dead, the black father proceeds to knock out the white son. Hours later when he comes to, the white son is shocked to find that the rest of his family was brutally murdered after being raped numerous times, all their belongings had been stolen, and the table was set, with everything as it was before the incident, with a note from the black family saying, "Thanks for the lovely evening."
I'll try to dig up a better joke if I decide to post one again.