I find some racist jokes funny because they're mostly a joke on racists on some level. On the other hand i find totally insulting that people dare believe that i'm actually racist if i happen to say a racist joke. In most cases it just means the listener is dumb enough that he doesn't try to analyze context and just wave his flag because he heard a bad word.
A joke is not a political commitment FFS, it's a fucking joke.
For your enjoyment at work in my unit we actually have a racist day every week where racist jokes fly all over the whole day, and most times make them with the targeted /(race|nation|skin color|whatever)/ present. It could go like that for example :
- someone : anybody saw my paperclip ? can't find it - someone else : Abdel probably took it, remember the guy is Arab, he steals all he can find. Seen your sister lately ? - a guy that happens to be jew : yeah Arabs are bad people, we've been telling you all along. - The Arab guy : Sorry i needed it for the seven virgin that are waiting for me guys.