Hitler's Obsession was to create a pure-bred Germanic superstate, and the place for it was in the East. But the Brits got uncomfortably in the way, and that alone may have been the key to his failiure.
He was not obsessed with the conquest of France or the UK, but since they declared war on him, they had to be dealt with. And he did not plan to conquer the USA, so declaring war on them was outright mad.
Dealing with W-Europe probably postponed his Russian plan by a year. And since the UK refused to be at piece although alone, it meant that his plans for the east were different, slower, later, weaker and worse.
So in short, when I interviewed Hitler, this came out:
Name: Hitler
Occupation: Dictator
Hobby: Cleaning human breed.
Assignment: Make more lebensraum
Enemies: Inferior races, i.e. Jews, Slavs etc.
Obstacles: The British
Favourite music: Wagner
Favourite food: Vegetables
Favourite person: Hmm. Caesar?
Most hated: Churchill
Favourite place: Bavaria
What would you do if you freed a Jinni, and got one wish: Kill all ze Jews, ahh, no kill all the Bolsheviks, there are more of them.
Ok. Thank you Mr. Hitler. You can leave now
