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?
The gravity of sin is measured by what it offends, not by how long it takes.
A slap is a small offense to a peer, a great offense to a parent, a grave offense to a king, and a capital offense to the divine majesty. The act takes the same instant; its weight is given by its object.
Hell is not God inflicting torment on creatures who would prefer his presence. It is the eternal ratification of a will that has finally and freely refused him. To force such a will into communion would be to abolish it.
The fire is real. It is also not the worst part. The worst part is the loss.