I agree with what you say, Jim and Dave. It's all about taste and the audience who are hearing the jokes.
The very name Schindler evokes the Holocaust to some.
Dark humour has its place though, in discharging tensions and helping people to cope.
I just feel one has to consider the recipients of certain jokes so as to avoid offence. Being aware is the key.

And people seem to be more sensitive nowadays, almost on the lookout for racism, sexism et al in order to complain. A bit 'snowflaky' in some ways.

An example:-

My grandfather fought in WW1, and when I was very small he often used to relate seeing his comrade's head getting shot off, and as it rolled away he said it 'winked' at him. He thought this was hilariously funny, and no-one asked him to stop telling me, a little girl, over and over about it.
We were more robust in days gone by.