Sending troops into Russia was the ultimate mistake.
I can't truly believe that this was intentional, or could ever be seen as a decent strategy.
It's more likely that traitors were deliberately issuing evil recommendations and terrible ideas. Even an idea like the holocaust is absolutely asinine.
It's better to establish Israel, and then forcefully boot all Jews out of Europe, and into Israel. That would create peace and solve the issue.
Then there could be no rumors of civilian murder, and beyond just that, if German troops had remain in Germany, or had focused more on England instead, then that would be preferable.
Beyond just that, I cannot truly believe that the Japanese would REALLY choose to literally kill themselves on Pearl Harbor. Now, be aware that Pearl Harbor is not on mainland USA.
It is far, far, out to sea, in such a position as to be nothing more than a defensive post. It likely cannot properly perform an invasion, nor is there anything gained from invading it.
Thus, it is likely that the Japanese turned traitor, and sent men to die for the sole purpose of tricking America into joining the war against the Axis.
Spain should have been allied with Hitler. The world would be better, and I'm not even a National Socialist. I would just prefer the history of the world where Hitler wins WWII, but due to economic issues and war weariness, they still slowly dwindle in power, to create a more fair, balanced environment.
Essentially, WWII should have been settled in Germany's favor, but then Germany should be happy that they won, and stop expanding, stop exerting such strength, allowing the other countries around them to normalize, thus allowing European civilization to properly continue.
That is the righteous course of history.