it might seem very cynical, but I assure you it is minimally reductionist and barely cynical
this is pretty much the authoritative book on the subject
https://www.amazon.com/Meaning-Second-World-Verso-History/dp/1844674797
if you want to understand the horrifying depth of the relationship of the Nazis with the US govt, I recommend this one
https://www.amazon.com/Trading-Enemy-Nazi-American-Money-1933-1949/dp/0595431666/ref=sr_1_1?dchild=1&keywords=trading+with+the+enemy&qid=1618521780&s=books&sr=1-1
The shaping of the narrative of US involvement in WWII and its true role, as opposed to the one in the US press, is quite appalling once you engage with the subject enough to fully understand it.