Hitler was counting on a repeat of the Russian WWI collapse. There is the famous quote about kicking in the door and the whole structure would collapse. Hitler was an enoromous risk taker and he gambled on a quick victory in the east. There was no plan B or strategic reserve to draw upon. The Germans were not capable of a long term campaign against Russia. It was all or nothing in the first weeks. The war was basically over by Dec. '41 when the Russians withstood the initial losses and regrouped. Absent a political collapse it was impossible for the Germans to win a military victory given the disparity of resources and size of Russia while also defending in the West and fighting in N. Africa. The Japanese might have helped with their navy to block the supplies being sent by America, but like Finland and other German allies in the east they didn't have the land forces to make much of an impact against the Red Army.
Hitler is the best example I know of that illustrates the flawed nature of "outcome based decision making." Studies show the most successful gamblers (specifically poker players) break into 3 levels. First, those who understand the odds. Second, those who understand the other players (physical tells or betting behaviors,) but the thing that separates the truly elite players are that they practice "non-outcome based decision making models." In other words, they have a set of principles and guidelines that they stick to, and only break with careful consideration (so that they don't become too predictable.)
In other words, they are not relying on luck, but they play the odds, the other players and make very intentional decisions when to take risks and do not count on the "outcome" to justify it.
So, they may try to get a flush or a straight on the river, but they know this is a bad decision and catching that card is a bonus. It was luck and does not mean they made the "right" decision.
How this applies to Hitler is that he kept catching cards on the river and thinking that it justified his belief in his own genius. As most bad gamblers who believe in their luck, they take greater and greater risks until they fail spectacularly. This model helps explain an awful lot of huge blunders on the world and corporate stages. The luckier I am the more I push my luck and my past actions justify it.
Once I learned this and started approaching poker this way, I became a much better player and rarely lost huge while increasing my number of victories. I have watched several companies fall into the same trap where risky bets paid off which they thought justified a business model or other strategy and were blind to its weaknesses or increasing obsolescence.
Of course, with Hitler it does not explain the whole story, but just offers a lens into how he and the German military and people got fooled into such a stupid course of action. It takes great humility to stop believing in your own greatness and assume you are fallible, but often that is what leads to greatness as it does with great poker players. One last pun, as we know humility was not Hilter's or Germany's strong suit at that time.
That's all folks!