This involves denying the reality of justice. Justice rests on the premise that it matters to God and to the very being of creation that good prevail and that evil perish. Justice is written into every atom of creation, and justice is inescapable. To deny hell is to deny justice. One can add that, when hell is denied as a reality and place, hell reappears as world-wide injustice and evil.
Earth then becomes hell because the reality and finality of justice is denied.
To deny hell is to insist that life must be without moral risks. When churches become antinomian, they quickly then downplay the fact of hell because it emphasizes the ultimacy of God's law and justice. To deny hell is to deny the reality of morality and justice and to affirm a cosmic relativism. The fact of hell is our reassurance of cosmic justice. But there is more.