I think that the only reason anyone accepts the concept of eternal torment for wrongdoers is because we don't have to face it. Not the torment, just the concept. Hell is somewhere else, and we don't get to peek through a window into it. For us, it exists only so long as we are thinking about it. And if we stick to the superficial and emotional appeal of the concept, it seems just. Oh, Adolf Hitler is writhing in torment forever and ever? Sounds about right! Then we turn our attention to a spreadsheet or lunch or TV, and Hitler isn't being tormented anymore.
Ask anyone who believes in a fiery hell of eternal torment to visualize the following:
Somewhere in Hell, Adolf Hitler is writhing it unbearable pain, screaming for the sweet release of death which will never come. He is shrieking his apologies for every last act of wrongdoing that he can remember, all the way down to the time he took an extra slice of pie from the icebox. Fire burns his flesh, whips dig into muscle, cudgels crush his bones. And it just won't stop, and god he wishes it would just stop please stop no more no more i'm so sorry...
Just a few yards away, another sinner suffers the very same fate. Incredible pain wracks her body from end to end, every nerve screaming in sheer agony as cruel and vile injuries are inflicted upon her body, over and over and over. She would repent for her wrongdoing, but all she knows is a swirl of pain. So much pain. Foever and ever, it will never stop. What's her story?
She was abandoned as a child, and raised by a man who sexually and emotionally abused her for years. As a teenager, she turned to drugs to cope with her emotional pain, as well as the physical pain inflicted by her abusive boyfriend. Finally, unable to see a way out, she killed herself.
That's Hell. Proof of a loving and just god. Makes sense.