The European Jews would never leave Europe on their own. Rothschild needed to create a big event to scare the Jews out of Europe and move them into Palestine… to create israel, to nationalize the jew, by creating their own homeland.
The side benefit of WW2 was to spread Zionism throughout the world…and get the goyim to kill each other… using the mighty German NAZI Army at the time.
The German NAZI Army stole and looted every country they invaded for the Jews. Same way Jews today using USA Military to do the same.