The narrator devoted about ten words to that possibility --then dismissed it for having no "compelling" evidence.
Much attention was paid, however, to FDR's frustration over not being able to enter the war due to isolationism and anti-war sentiment...prior to Dec. 7, 1941.
I also noticed Alger Hiss, smiling broadly just behind FDR in the footage shot at the meeting with Stalin and Churchill in Teheran.
The narrator didn't note Hiss's presence.
Note also, that Harry "The Hop" Hopkins - FDR's alter ego - is also present at the time ... from the VENONA project ... ye olde Harry was a Soviet agent.
But no matter ... the many oddities of FDR and the provocations against the Japanese are well known ... except to most Americans!