An eternal hell is unjust.
The objection, in full
Even the worst sinner — Hitler, Stalin, the child murderer — committed at most a few decades of finite wrongs. To punish a finite wrong with infinite torment is moral monstrosity. No human court would do this. A God who would is morally beneath us.
I would rather hell than the heaven of a god who tortures the dead.
or, in plain terms —I'm a decent person and your God would still send me to burn forever?
I feared hell because I loved my sin.
When I was unconverted, the doctrine of hell seemed to me an obscenity. After my conversion, I understood: the obscenity was what I had been doing, not what I had been threatened with.
We do not understand hell because we do not understand the weight of refusing love. The wedding feast is set; the bridegroom waits; the only way to be outside is to walk out.
It is a mercy that he warns us. The threat is the sound of the door he is holding open.