It's not really that baffling. What was done to the Jews by the Nazis is utterly indefensible. And some of the attitude that led to it still persists in society. The Zionists used that to guilt trip the world into banning public criticisms against Jews and Israel - legitimate or otherwise. They use it to silence even the ultraconservative Jewish sects and actual Holocaust survivors who speak up against the transgressions within their community. This was particularly effective in Germany as they were coming to terms with what they had done.

This is why we should never encourage victimhood narratives by anyone. They're very often trying to emulate the atrocities they describe. Hate speech should be condemned and called out - but uniformly without discrimination.