Franklin D. Roosevelt had his fingers in his ears and said LA LA LA LA LA as long as he could
Now in ‘14 and in ‘39, war raised it’s ugly head,
The bombs they fell on England, and one fell on my shed,
But we fought and beat the Germans ‘cos we knew just what to do:
We stuck our fingers in our ears and went ting-a-ling-a-loo.
-Benny Hill
It was the general populace that was isolationist. FDR wanted the US in the war against Germany. Japan was his back-door ingress.
There was no valid reason to move the bulk of the Pacific fleet from contiguous San Diego Harbor to Pearl Harbor - 3000 miles from the mainland, and 6000 miles from the capital - a place that was merely a Territory, not a State of the Union, except as an explicit threat to Imperial Japan. Admiral Richardson rightly opposed the move, and was replaced.
I am not an apologist for the Axis or for Japan. I simply recognize the fleet move for what it was: a shot across the bow. A martial culture like the Japanese would not have taken it any other way - quite apart from the political and economic pressures applied by the US.
The fleet moved in 1940, and was attacked in 1941.