>>149703895
Sins comes from intervention of Satan during Creation. This is why world is flawed. Reason for that has different explanations, but most commons is that God allow evil to give people a choice.
When Christ is killied by people, he is more killed by evil in them. But God let people to do that, only to forgive them.
He says, "Just as I don't choose revenge, you don't have to choose sin. I sacrifice myself, just as you sacrifice yourself by not choosing sin." This is a departure from the old rhetoric of God, who demands and punishes disobedience.
I think this is quite clear. Therefore, the real question is different: Why didn't God give people Christ immediately? This has been explained in various ways. For example, Jung argued that after Job, God matured morally for Christ. Personally, however, I believe that even if humanity was condemned to sin, it was not intellectually ready for Christ for a long time. The Old Testament was the book of childhood humanity; the New Testament is the book of self-aware humanity.