How dumb are you interventionists? Germany after WWI would have been in no position to wage war against the United States, and I can't think of any reason why they would have wanted to to do so anyway. There was nothing noble in that war, and no compelling interest for the US to get involved. Impossible to know what would have happened, but it's reasonable to assume that without US intervention, there could have been a negotiated settlement, no punitive treaty, etc. and the conditions for the rise of Hitler would not have existed.

So you like intervention, Richard? Afghanistan must have you in stitches.