What's the difference between Jews and Blacks? Jews are 'still born' and whitespaces are important.
Do you think it is bad to tell jokes about blacks and Jews?
I mean I'm not denying it if you think so, you seem to know what you are talking about
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 it. You should go to a holocaust museum to understand what happened there and why it can be hurtful.