Hitler was baptized Roman Catholic..so once a catholic always a Catholic...hey he may be in Catholic purgatory
I doubt that anyone is stupid enough to believe that, proving even more loopholes in Calvinist theology and that the evilest among us have chosen to reject Catholicism.
Hitler is a person to ponder on and wonder why? If he was in fact at one point a believer then what happened? Did someone elses actions against him drive him to such a horrid fall? Or was it a choice he made simply for the lust for power? Judas as well at one point was a follower of Christ.
It's interesting Peter denied three times knowing Christ and was saved because he repented. Judas didn't simply deny Christ but rather he rejected and betrayed him for gain. Another person comes to mind as well. A certain man whom made a fortune in porn who was shot and claimed to have become a Christian and immediately was doing blasphemy against Christ. I think we all know of whom I speak. At some point I think it goes back to Christ warning "By their fruits you shall know them".
If he was granted the grace of repentance and as his last act (or very nearly) invited Jesus into his heart, why not? He'd sho' have some vicious dispositions to be purged.
But the smart money is on his going to the toaster oven.