What's the difference between pizza and a bunch of jews? The pizza makes it out of the oven.
Aren't you concerned that you will offend someone joking about the Jews?
Yes, of course I am. It's just a joke, you know
The holocaust was a traumatizing event for many people and it can be hurtful to be reminded of it even by mentioning or joking about them being burnt alive. You should go to a holocaust museum to understand what happened there and why it can be hurtful.