Who created Hell, though? If God doesn't cast anyone into Hell, but lets them go there and stay there against their will for eternity, he is still responsible for that.
If God is omnipotent, then ultimately the buck stops with him - in a sense he is responsible for the way everything is, even if he didn't initiate it. Either he can't help those in Hell, meaning he is not omnipotent; or else he can but chooses for whatever reason not to, in which case he is not benevolent.
Regards, Michael.
Consider Hell and Heaven, as a possibility, to be the exact same location but with polar binary states: Earth.
On the one hand, you have Heaven, which is represented by a binary state of 1, meaning that all that bears meaning and purpose and positive alignment ends up there. Imagine Heaven as the possible utopian Earth we never could experience because of the fall of man. It would be a world without darkness, pain, agony, disease, suffering, disaster, impurity, or death. As intended, death cannot tear us from it.
On the other hand, you have Hell, which is represented by a binary state of 0, meaning that all that is without meaning and purpose and has negative alignment ends up there. Imagine Hell as the Earth we live in now, the dystopian world we chose to live in when we defied God and fell from grace. That is a world filled with darkness, pain, agony, disease, suffering, disaster, impurity, and death. It is only different in that death cannot release us from it. For all we know, the true cruelty and suffering of Hell may very well come from what the world would be like if only the wicked ruled it, and no one did good to balance it out.
God provides two simple choices for mankind. The first is that we can embrace him, indicating we want to be with him, and shall go to Heaven as is our desire. The second is that we can reject him, indicating we want nothing to do with him and would rather be with Lucifer, and God shall allow us to go to Hell, as we desire. Both paths are made clear to us, and which one we cling to is by a choice entirely of our own volition.
So, though God assigns fate, he gives us a lifetime to choose. Even in our dying breaths, we can change our path, for better or worse. Understand, though, that Heaven and Hell are simply a matter of choosing between two masters. God is no happier about losing those he created than Lucifer is about losing those he could potentially have garnered.