A time traveler goes to kill Hitler. He is drinking at a bar. The traveler sits down and orders a drink. “Do you know what I hate?” Hitler says. “I don’t know, Jews?” the traveler replies. “I was going to say time travelers coming to kill me. But now that you mentioned it…”
Another funny joke posted by forlonPeanut, originally seen on Reddit.
Could be a good premise for a film: all the Jews coming back in time to kill him is what starts him on it in the first place.
Could be set in WWI, when he is a soldier in the trenches.