Well, I didn't believe it either until I started looking into it. I was shocked what I found.

FDR goaded the Japanese into attacking. He cut off their steel supply, which largely came from American scrap. Then he cut off their oil supply, which came from the Dutch East Indies. He boxed them into a corner without any way out. He empowered the "hate everyone" militarists and pulled the rug from out under the peace faction. If you have the time for it, this is a fantastic video on Japanese factional politics 1919-1945. https://www.youtube.com/watch?v=qE_iNUXhrfw

Admiral J.O. Richardson: The admiral said he was going to tell a story that the lieutenant could regard as a parable. "Assume", Richardson said, "you were the leader of the greatest nation in the world, and assume that you saw, in another hemisphere, the development of a power which you regarded, and with reasonable support, as a total threat to Western civilization as you knew it. Supposing, however, for various reasons, your conception of the danger was not shared by your constituents, your own people. And you saw the total destruction of western civilization in the hands of this adversary, and your detected in your own people, at the time, on the basis of everything they knew, a lack of appreciation of the problem. Assume you saw that the only salvation of Western civilization was to repel this particular power but that required you to enter a foreign war for which your people were not psychologically or militarily prepared. Assume that what was needed to galvanize your own people for a unified approach towards this basic danger to civilization was an incident in which your posture was clearly of passive non-aggression, and apparent unpreparedness; and the incident in question was a direct act of aggression which had no excuse or justification. Assume that you saw this potentiality developing on the horizon and it was the solution to the dilemma, as you saw it, of saving civilization and galvanizing your own people. It is conceivable, is it not, that you might be less disposed to create a situation in which there might be no doubt as to who struck the first blow"...."It's a fable. You just think about that fable as you study some of this material. And, it's conceivable that it might have some enlightening factors."

That about explains the United States allowing the Japanese to attack her. I recommend the book Infamy, written by a credible historian. He went and read every single piece of correspondence written about the investigation afterwards and concludes, yes the commanders of Pearl Harbor were hung out to dry and blamed so that FDR could have his war.

https://www.goodreads.com/book/show/1656121.Infamy