Someone that jokes like this possibly is one that has done this.
Yep - lots of comedians have committed holocausts as well...
/s
Insane to be fired over a stupid comic line (that was a copy of something said previously).
The thing about humour: if a statement was true or acceptable it would not be funny - exaggeration being a common element of comedy.
But yeah - fire someone for a tasteless joke(regardless of context) but ignore China, unionization in the USA, unconstitutional collaboration with NSA (PRISM)...