If the central focus of Christianity's atonement doctrine were true then you would find Jesus teaching that he came to be a sinless sacrifice to atone for the sins of mankind. Jesus never even used the world atonement. Jesus never taught the doctrine of the atonement. Jesus never referred to himself as a sacrificial lamb.
That's news to Jesus -----> "But now you are trying to kill Me, a man who has told you the truth that I heard from God. Abraham never did such a thing. You are doing the works of your father.”"
Killing Jesus was the work of the devil!
Jesus doesn't agree with this theory that he was supposed to be killed by the Jews as a sacrifice for your sins. He had been teaching that we receive forgiveness directly from the Father who has always been forgiving.
The Original gospel of Jesus was contaminated by old ideas.
Jesus is the lamb of God to take away the sins of the world just like John the Baptist said and God showed him. Jesus did forgive sins, heal the sick, raise the dead to prove He was the Son of God, Emmanuel. This didn’t deal with the need for people to be born again or death inherited from Adam. That’s why He had to die, present His blood in the the true tabernacle in Heaven for us. Jesus is the once and for all eternal sacrifice for sin and death. The New Testament after Jesus rose is the whole Gospel and ministry of the Holy Spirit, not a false teaching of Paul or anything of the sort.
“Nevertheless I tell you the truth. It is to your advantage that I go away; for if I do not go away, the Helper will not come to you; but if I depart, I will send Him to you. And when He has come, He will convict the world of sin, and of righteousness, and of judgment: of sin, because they do not believe in Me; of righteousness, because I go to My Father and you see Me no more; of judgment, because the ruler of this world is judged. “I still have many things to say to you, but you cannot bear them now. However, when He, the Spirit of truth, has come, He will guide you into all truth; for He will not speak on His own authority, but whatever He hears He will speak; and He will tell you things to come. He will glorify Me, for He will take of what is Mine and declare it to you. All things that the Father has are Mine. Therefore I said that He will take of Mine and declare it to you.”
John 16:7-15 NKJV