Why is Sin So Disregarded by the Very Stoic World

The World is constantly pushing itself to conform to a situation where every type of person is increasingly fairly regarded from every corner of the government and the populace.  It's difficult to make so much provision, yet Christians are nominally hated for any mention of sin.  It's curious.  They don't want to consider that they have any need for the Savior, even though they tacitly recognize their own need to change themselves.  Their need to change is kept to a minimum of conformance due to learning something new, such as another person's point of view or experiences.  They also want to see God as someone like themselves, so they think He will overlook any wickedness they notice about themselves, especially if they try hard to repent of it.  But like Cain, who couldn't find real restitution in his own works and became charged enough with murder in his heart that he expressed it, even against his own brother, and then hardened himself to disregard it as much of a crime when he tried to hide it from God and then, when he couldn't hide it, didn't express remorse but only thought of how others would kill him, the World's mind is ill, and the gospel of Master Jesus Christ doesn't seem to be necessary to them as something to conform to for forgiveness of what they don't understand is quite worthy of the severest punishment.  But they have look-alikes in their petty and resolute desire to stop their perception of a generalized evil that they think comes from differences between groups and individuals.