The problem of confronting the reality of hell is not a logical one; it's an emotional one. People just don't want to believe that their family members or friends could be in hell forever. They just can't face up to the issue. Their recourse is to deny it.
If this life should teach us anything, it's that things do not always end up ok. Life did turn out ok to the many that died at 9-11; life did not go fairly to the nurse who contracted HIV because she accidentally got stuck with a dirty needle; life did not turn out fair to the innocent child who faced the horror of being tortured and killed by a lunatic.
But things will go justly according to God's standard of righteousness and it's in that context that they will be fair. All arguments against God will fail in that day. There will be no one to rail against God that he's not being fair or that he's being too harsh. The Bible is clear that all will bow before their Creator and acknowledge Him as LORD. All voices will fall silent before their Judge. And God will give them what they sought in this life; a world where He and his Son do not exist. Hell is a place for the damned, absent of the presence of God.
Another way we can put it is this: if God would not spare His own Son, but would allow Him to suffer at the hands of wicked men and allow Him to die the worst of all deaths, he won't hesitate to send wicked men to hell for eternity.