From the Polish point of view, its a whole lot better being on the recieving end of mindless jokes in America then it is being on the recieving end of a tyrants sword in Europe. I think the Polish joke died as a genre when Archie Bunker left the airwaves and was replaced by Lech Walesa and Karol Wojtyla. Men who stood against the might of the Soviet empire armed only with a flag, a slogan, and their faith aren't good humor material, they're heroes.
When I was a young lad, the best Polish jokes I heard were told to me by my 100 % Polish relatives. I think the Polish have a great sense of humor, too.