Young Isaac knocks on his boss's door.
Boss: "come in!, yes Isaac what can i do for you?"
Isaac: "I can't work here anymore! I quit!
Everyone who work here is anti-semite!" Boss: "What? What are you talking about? I guess there might be one or two, but everyone? come on, it's ridiculous!"
Isaac " I am telling you! They are! I asked all of them one question, and they all gave me the same answer."
Boss: "But... what was that question?"
Isaac: " I asked waht would they think if we exterminate all the jews and all the hairdressers"
Boss: "Hairdressers? Why the hairdressers?"
Isaac: "See? You're all the same"