I think many people would say that the persecution of Jews in Europe, culminating in the Nazi attempt to wipe them out, meant that there was no alternative for them but to establish a Jewish state in Israel, and that the unfortunate and continuing consquences of that to the non-Jewish people who were living there already were something that were inevitable in the circumstances.

There is a difference between saying that, and saying that the Holocaust justified the way that the Palestinians have been treated. But it is a subtle difference, that is often lost in arguments.

What is clear however is that the fate of the Paelstinians is ultimately a consequence of the Holocaust.