How do you pick up a Jewish girl? Go to Auschwitz with a dustpan and brush
What did you intend by this comment about the Holocaust?
It's a joke. It's not serious. I'm just saying that ashes are easier to pick up.
A lot of people alive today have grandparents that died in the Holocaust or narrowly escaped death, and it would upset them greatly to hear people making jokes about such a tragic event.  Jokes about any person being burned to death are too morbid to be funny.