A lot of these jokes, I think, are really made by antisemites.
No one would dare make Gay jokes in reference to "F@gg-t" (in reference to burning at the stake) unless they hate them. And the LGBTQ have never faced the Holocaust in such a systematic fashion, as the Jews have.
And here are these people, claiming they're not antisemitic, but gleefully joke about the Holocaust. And in this day and age, antisemitism is growing again in Europe.