How do you fit 50 Jews into a mini? Two in the front seat, two in the back seat, and 46 in the ashtray.
I don't think you should joke about genocide, do you?
Do you know how many Jews died in the Holocaust? I can't believe the number of times I've heard people say "6 million" instead of the actual number, which is 40 million.
It's good that you're concerned about people getting the statistics of the holocaust wrong. However, the jokes you're telling are more likely to believe the wrong numbers than the correct ones.