Leftist religionists like yours truly tend to place near-exclusive emphasis on God's Love, leaving the image of a judgey God to our fundamentalist cousins.
Well, this is why I believe in God's judgment.
In brief: cute little gay kid loves Lady Gaga, has posse of girl buddies, makes It Gets Better video, continues to be horribly bullied, takes own life. On the day of his wake, big sister attends school dance with her friends and his; when a Lady Gaga song is played, they start to cheer and chant his name – whereupon the bullies shout in response that they're glad he's dead.
People do evil stuff. People do evil stuff, and, so far from regretting it, they do more evil stuff. That can't be the end of the story.
If hell exists, it's self-awareness. It's having the conscience, maturity, and self-reflectiveness to comprehend just what a piece of shit you are. It's losing sleep to the roiling in your gut as you remember the time fifteen years ago when somebody made fun of the fat kid and you laughed. It's the agonizing remembrance of every cruel or thoughtless thing you ever said, knowing bone-deep how much it hurt the other person.
It might happen when they grow up a little, or it might not happen in this lifetime; but one day the children who hounded and persecuted little Jamey Rodemeyer to death and beyond it will know what it feels like to truly love and truly be loved. When they do, the full magnitude of the evil they have done will hit them like burning coals on their heads. They will know themselves, and they will be in hell.
God's justice is God's love. God's love is the very judgment that sends evildoers to the hell of self-awareness.
This hell is a necessary step on the road to redemption. No matter what you've done, there is no true redemption without experiencing the hell of self-awareness. For their own sakes, I want Jamey Rodemeyer's tormentors to know hell.