It is unreasonable to acknowledge that sin exists and refuse that a holy God would judge it harshly, this inconsistency is a lack of understanding in the nature and depth of sin. Even the worst sinners make excuses for the wrongful things they do, and self justification is the minimizing of sin.
A sinful person who tries to earn acceptance from God is like a leper winning as Miss Universe, a cripple an Olympic race, a mercenary the Nobel peace prize, or a moron the National Intelligence Achievement Medal. The distance between man’s tolerance of sin and God’s rejection of it, is as great as man’s finite limits and God’s infinite greatness.
The Christian should always proclaim the biblical wickedness of sin, because only then can people appreciate God’s love in suffering as a sacrificial substitute.