I don't think about Hitler much, although I'm pretty certain he's in Hell and so are a lot of other people. I don't see why I should feel sorry for the fact, since he started a war which killed milliions, was instrumental in the Holocaust, advocated torture for his enemies, etc. Why shouldn't he be in Hell?
Now I'll stick my neck out here. I've made this claim a number of times that on the night of the 11th January 1979, my own father died, and that he appeared in my bedroom in the unit I was renting at the time. He started with an apology for the cruel way he'd treated me all my life (showing no sign of remorse at any time), we argued and conversed, and at the end he gave this bloodcurdling scream and then just disappeared. It was obvious something was coming for him, and he was terrified to the core. He was a World War II vet and didn't scare all that easily. But the final scream was something else.
I still remember much of the conversation today, 40 years later. And I don't remember dreams. Four days later one of my uncles turned up to tell me, in the more normal human fashion, that he had died. I still remember standing there, counting back four nights, and when the penny dropped, thinking "Then what the hell was that the other night!"
Anyway to cut a long story short, I believe my own father is in hell, for the reason I've just given above plus I know for a fact he would not have confessed any of his mortal sins to a priest, or repented.
So to make it more personal, rather than appeal to the fate of an evil historical person, who for most of us was just that ie. purely historical, I think we'd be more honest if we stuck to people who actually have influenced us one way or another. I think the great majority of readers on this forum would have been untouched by Hitler's actions, except perhaps for what might have been done to their parents, grandparents or other relatives.
Am I glad my father is in Hell? Not particularly, but if he wasn't prepared to make one effort to get rid of his cruel, stupid, bad tempered, vindictive behaviour, then there's also no way I'd want him back again! If anything, after suffering the torments of hell, and quite possibly being imprisoned with people just like himself, all ripping and tearing each other to pieces with their bad tempered cruelty and vindictiveness, I think he'd be worse than ever.
So I wouldn't want him back again, unless he'd changed. And even then I'd be wary, wondering if the change was permanent, or just a decoy.
Rather than asking if we're glad or otherwise that someone may or may not be in hell, I think we should be asking ourselves if we'd want them back again, quite possibly in the same or worse state than they were when they died.
So ... would we want Adolf Hitler back again? Yes or no?
Personally I think we're a lot better off without him. Finally HE made the decision to act as he did - no one forced him to.
In closing, I'm get a bit cynical when I hear people say they wish all the evil-doers would repent and therefore not go to hell. Really? I'd have to wonder then how much they themselves have suffered at the hands of others. And I think in most cases the answer would be "not much".