The metaphor isn’t “lazy”, it’s just how people are making sense of the industrial-scale, systematic genocide they’re seeing played out in front of them. How does one encompass an atrocity? By relating it to other atrocities that have characteristics in common. And the Nazis remain the defining emblem of this kind of thing (in Europe, at least), so that’s what people relate it to in order to understand it.Often the nazi thing is meant to provoke Jews but more often than not it’s just a lazy metaphor because people can't be bothered to think of other comparisons. Neither me or cloo are zionists btw.
If you don’t want to be called a Nazi then rather then the easiest way to avoid it is probably don’t go around committing genocide.