A member of a party of six apparently discovered that the guy sitting across from him was Jewish.
He stated that his uncle had died on the Titanic and blamed the tragedy on Jewish people.
Another of his fellow diners quickly protested that the Titanic was sunk by and iceburg, to which the angry man replied, "iceburg, Goldberg, it's all the same."
Before y'all flame me, you should know that this story was told to me by a jovial rabbi I befriended on a recent flight from Chicago.....
I know many Poles, Irish, Jews, and Blacks that tell jokes on themselves too. They tell the joke BEFORE you tell the joke. It's a defense mechanism.
The rabbi was playing schlemeil.