You think it’s CLEAR whether or not FDR knew that Pearl Harbor was going to be attacked..?
There are TONS of experts who know more about the matter than you and I combined, yet there are plenty of people on either side of that one.
What I know is Hitler was on the March in Europe and the US was on the sidelines, tired from WWI and not enthusiastic about helping Europe fight another war. The right thing to do was to fight the evil Hitler brought, but it took the Japanese direct attack to bring us into the war. Hitler and Japan were allied. We, the US, addressed the threat.
Speculation about whether we knew about Japans intentions specifically to Pearl Harbor or not is another distraction. Like other enemies we have tended to ignore, the Japs communicated their intent through actions prior to Dec 7, 1941. The US just didn’t want to hear it.
You don’t have to want to fight to get into a war. Sometimes its forced upon you.