Because you're digging yourself deeper and deeper.
Did you hear what the Cap'n said?
Racism frequently leads to action.
Why are you not getting that?
Why are none of you getting it?
You are making no effort at all to explain why you feel the holocaust was funny; you've merely amended it to add that it's a rather poignant sort of funniness, one which causes you to weep humorous metaphysical tears at the absurdity of it all.
This does nothing to clarify anything, except that you don't get it, but don't worry: you're obviously part of a very large club.