He didn't have to die for your sins....God forgives a contriet and repentent heart because he is God. At no time did God every require a human "blood" sacrifice in atonement for sins. God specifically condemns human sacrifice.
Goerge, I know you know Messianic prophecy, so I'm surprised you said that.
How does He "take away the sins of the world"? How did an Israelite atone for their sins in the OT? The sacrificial lamb. Now, lets complete John the Baptist's statement:
"Behold the Lamb of God, which taketh away the sin of the world."
Why is He the Lamb of God?
Why did Jesus say this?
Mat 26:39 And he went a little farther, and fell on his face, and prayed, saying, O my Father, if it be possible, let this cup pass from me: nevertheless not as I will,
but as thou wilt....
... Mat 26:42 He went away again the second time, and prayed, saying, O my Father, if this cup may not pass away from me, except I drink it,
thy will be done.
This tells me it was the Father's will that He be sacrificed. (crucified)
Then there's Psalms 22 and this Isaiah passage:
Isa 53:3 He is despised and rejected of men; a man of sorrows, and acquainted with grief: and we hid as it were our faces from him; he was despised, and we esteemed him not.
Isa 53:4 Surely he hath borne our griefs, and carried our sorrows: yet we did esteem him stricken, smitten of God, and afflicted.
Isa 53:5 But he was wounded for our transgressions, he was bruised for our iniquities: the chastisement of our peace was upon him; and with his stripes we are healed.
Isa 53:6 All we like sheep have gone astray; we have turned every one to his own way; and
the LORD hath laid on him the iniquity of us all.
Isa 53:7 He was oppressed, and he was afflicted, yet he opened not his mouth:
he is brought as a lamb to the slaughter, and as a sheep before her shearers is dumb, so he openeth not his mouth.
Isa 53:8 He was taken from prison and from judgment: and who shall declare his generation? for he was cut off out of the land of the living: for the transgression of my people was he stricken.
Isa 53:9 And he made his grave with the wicked, and with the rich in his death; because he had done no violence, neither was any deceit in his mouth.
Isa 53:10
Yet it pleased the LORD to bruise him; he hath put him to grief: when thou shalt make his soul an offering for sin, he shall see his seed, he shall prolong his days, and the pleasure of the LORD shall prosper in his hand.