We only got into this one because our govt hates socialism. BUT, the citizens were viewing this as just another European war and, being an intolerant nation at that, didn't mind German policies. So, how to get them riled? Drag in the allied Japanese with oil embargoes and use their broke code to get them to attack at Pearl Harbor. The govt sicked the people on the "inscrutable alien yellow menace" and, by alliance, their German partners. Voilą!
Real history ain't in the movies or "popular" books....
Just another political holiday.
And, yeah, I was a real military historian, as in U.S. uniform and all that. Paid attention and learned A LOT!