My anybody but Hitler theory. It could have been a nationalist as long as he wasn't a maniac that attacked Poland,

got in wars with England and France and persecuted the Jews.

It seems to me that Germany could have gotten out of the Versailles Treaty pretty easily with Russia building up a huge army. Stalin wasn't being cute about it either, it was a huge offensive force. Most historians would agree he was going to use that army.

Would we and our allies have gone along with Germany rearming this time on our side?

A German nationalist when it all began thought Hitler was the greatest guy, but he turned out to be the worst for his cause. Kind of like with Trump.