I think Hitler was a good guy if you consider how well he treated animals he even gave them showers .
People were killed because of how they'd looked at the time. Do you support such persecution?
No, I don't support it. I just thought it was a funny joke.
I understand you were joking, but it's potentially harmful to joke about such things. Suggesting jews are animals is harmful to their image. Some folks may even believe it and tell others too.
Some people don't have a sense of humor.
There are things that are simply inappropriate to joke about, such as the holocaust. You should avoid making offensive jokes because people will not find it funny.