And them building the camps and The Final Solution, which is traced back to 1942.
“The nature and timing of the decisions that led to the Final Solution is an intensely researched and debated aspect of the Holocaust. The program evolved during the first 25 months of war leading to the attempt at “murdering every last Jew in the German grasp”.”
https://en.m.wikipedia.org/wiki/Final_Solution#
And during the Wannsee Conference they discussed the Jews living in countries not under German occupation, including the US.