One question though; if Hitler believed that what he was doing was for the betterment of mankind, the world... If he truly believed he was doing a good thing, does this make him worthy of an eternity in Hell in the eye's of God?
It's not my call. While I do not believe that human minds are capable of knowing the nature of the Divine, I believe that Hitler would be worthy of immortal salvation if he were truly sorry and remorseful for the atrocities he inflicted on millions, even if that realization came a sacond before his death.
Of course, even if he were remorseful, he obviously would not and should not escape the harshest punishment from humankind.
