Plans laid before Hitler came to power.
As early as August 1933, Samuel Untermeyer, president of the World Jewish Economic Federation called together a large congress of Jewish leaders from all over the world to declare war on Germany in the name of the Jews.

https://blacksun666.org/World_Jewish_Congress.html

1934

Hitler becomes dictator of Germany

https://www.history.com/this-day-in-history/hitler-becomes-fuhrer