Why’re You Always Telling Jokes About Jews?

Two men sitting on a train are talking. One guy says, "Did you hear the one about the two Jews who are walking down the street..." The other guy says, "Hold it! Why are you always telling jokes about Jews? I find it offensive. Why must they always be about Jews?" "You're right," his friend replies and starts the joke again: "So, these two Chinese guys are walking down the street on the way to their nephew's bar mitzvah..."