Except that the Nazi nation state no longer existed after World War two. It was dismantled and replaced with a new one, it wasn’t even contiguous it was carved up and divvied out to allies who had different ideas about what the new state should look like. The Nazi state didn’t have a right to exist, and neither does any nation state. They’re just legal constructs and should be discarded when they are harmful.

Saying that the nation state of Israel doesn’t have a right to exist isn’t the same as saying the people of Israel don’t have the right to exist. A nation state is just a legal construct, it doesn’t have human rights. The people who live in any region are not the nation state, and they have a right to exist, but they do not have the right to create and maintain an ethnostate that oppresses other people.