The early christians overwhelmed by the happings, the death and resurrection of jesus, looked for answers and they found answers in the scripture and in the tempel sacrifice of the jewish Day of Atonement Jom kippur. The symbols and pictures of the Day of Atonement (asasel, lamb slaugthered....) were connected with the death of Jesus and thus we mean it was a necessary sacrifice.
Jesus was not sacrified or killed in the temple, like the animal. His blood did not rin over the altar in the temple. Thus his sacrifies can be compared with the jewish sacrifies but has a totally other meaning.
The death of Jesus is superior,
1. it is not a sacrificy from man to God, it is a gift from God to men.
2. Not a human effort by jesus to fulfill any sacrifce-laws of a divine law but showing that all human sacrifices are helpless efforts and worthless.
3. Jesus death means that salvation comes from God, not salvation from a man to god dying on the altar as sacrice
4. Since Jesus all temple sacrifices are dispensible and needless because not really helpful, most important was forgiveness and mercy before doing any sacrifice in the temple. God said: I dont need your sacrificies, i want your devotion. A devotion like Jesus, that is what I want from you all and this will save you, not animal sacrifieces.
5. The matter was that Jesus life has much more value on the scale than Adams perfect life. Because jesus was more than Adam, he was that guy who created the universe and adam.
6. So Jesus value of life would weigh much much much more on a scale of justice than Adams sins, even the sins of all mankind together, it would never never never be corresponding ransom- but a second to none ransom, in the ransom picture of course, but it is only a picture!
7. jesus was for the christians the true cosmic day of atonement.
8. In jesus the idea of redemption and substitute got a new sense. As jesus the laymen he became the only true priest of the world.
9. His death as criminal (not sacrifice), happened not inside the liturgic play in the jewish temple, where everbody had its role, no but he died outside the jewish safricie-rituals, inmidst of the world - in the public . This was a sign..... that his death had public meaning ... and he died in front of the true temple, before God himself. (Hebrew 9,11....)
10. His blood and his life was not a objective donation, that could be measured and quantified, it was simple the consequence of and expression of the totality of his devotion and his service.