Wow - Speculation at its finest. From lack of subs, to lack of bombers, to incorrectly trying to turn ME-262's into bombers, to discounting a jew who was trying to tell him how to build the bomb, to the bomber that could deliver that bomb to the US of A...The list is endless.
The short answer is, like all wars in history, it is the screw ups you make that cost you the war and Hitler made plenty of screw ups.
-S
__________________
 
|