That last paragraph is a load of bs.
As long as FDR was in office, there was literally no way the US would have joined Germany. It wasn’t a matter of if, but a matter of when the USA got involved. The us was in by proxy before 41/42, Doing the same stuff the modern US has done for Ukraine, but for the Commonwealth nations.
Hardly. That’s like me telling you that you should care about the politics of Britain or Australia.
Sure it might be mildly interesting to spectate, but its not like you should care much.