God would justly remove all who are in the world from the world, all are sinners, and God would remove the world which has the curse from that, too. God is love, and as such, without being limited in it, sent the incarnation of Logos the Word with God who is God to the world, to lead any of those there showing his example to come to repentance turning from sin, to bear the sins, with his death on the cross, and to make available salvation with eternal life in him. Those in him can then be delivered from this world cursed with all the sin, and creation still groans for the deliverance which comes with the revealing of the redemption. Purification from sin comes through Christ, which is what we could not ever accomplish through what we do or go through ourselves if even through eternity. In Christ all are removed from sinful nature right away and meet him when dying in the body still of this world. Judgment on all left unrepenting still comes, and there is no deliverance from that.
2 Peter 2:24 “He himself bore our sins” in his body on the cross, so that we might die to sins and live for righteousness; “by his wounds you have been healed.”
Isaiah 53:3-5 is quoted there.
It is not about some sins, and not others. Christ bore sins for all who come to repentance, and salvation is made available through him.