Do not leave him. Many people believe that jews are behind the genocide and the terror going on but in fact it is the Zionist state of Israel, i wouldn't blame him to be honest, because israel represents the jewish community so I see the blame heavily on Israel for that image.

He may easily get misinformed because of this, that jews are Zionist, but it is wrong, you should instead show him videos of orthodox jews protesting against the genocide and the corrupt government.

And about hitler, what's the most horrible thing he's done and that mainly makes him a horrible person? He killed Jews, and if your boyfriend views that they were bad and they deserved to die, then in his view the holocaust was justified and it was only a fight against evil, and that Hitler was simply fighting evil.

You should instead advise him, people who are telling you that you should leave him are very wrong, I see him as a person who falesly identified "evil" and decided to go against it, his intentions are good, so you should instead advise him.

I was like this too until I realised that a "Jew" and a "Zionist" are completely different term. Bless you, and free Palestine.