True, but I do think it does speak to what Hitler’s eventual plans were. Certainly he did know that a world war was coming because he was already in the planning stages of “Fall Weiss” (The invasion of Poland).
Yes, in 1939, Hitler's general war-plans for Jews were suspected by some, including FDR.
That explains some of the actions Roosevelt took then attempting to rescue more Jews from Nazi Germany.
But nobody in 1939 could imagine the magnitude of Hitler's military victories, and the resulting scope of his "Jewish Problem".
In perfect hindsight, Roosevelt's actions appear well intentioned, but woefully inadequate.