there are some problems with that according to Judaism. First, Judaism doesn't believe in human sacrifice. Second, as sacrifices go, Jesus wasn't eligible to be a sacrifice. Third, if somehow his death was to ratify a covenant, then it wasn't related to sin at all. I'm sure there are other issues, but whatever you believe is fine with me.
You don't believe Samson sacrificed his life; that Hannah and her sons did not sacrifice their lives, King Saul and his sons made no sacrifice of their lives for the good of all Jews? More currently, haven't their been rabbis who sacrificed their lives?
In his time, Jesus came with a message:
Repentance for the forgiveness of sin. The argument used against Jesus was that only God could forgive sins, and he could not speak for God or there would be signs from above. Recall Abraham. He sacrificed a three-year-old cow, a three-year-old goat, a three-year-old ram, a dove, and a young pigeon to establish a Covenant with God.
In the story of Christ, God was calling for a new covenant with his people, the Covenant of, "Sins are forgiven." Just like many Biblical characters before him, Jesus sacrificed his life so that all would know God declared, "Repentance for he forgiveness of sins." Religious people of power in his day (who did not happen to like this message) told him to cease and desist. Jesus chose to obey God instead of those with power, thus sacrificing his life. It was not the blood of a cow, a goat, a ram, a dove, and a young pigeon Jesus spilled out. He gave his own blood to be spilled, the sign of this New Covenant (New Testament).
The next signs: He rose from the dead. He ascended into heaven. That Jesus returned to life was witnessed, not by all, but by hundreds. Many of those who did not witness, did not believe. Today, "Repentance for the forgiveness of sins" is taken as a given, even by Jews. Old Testament passages came to mind, correct? God did not just spring a surprise on people with
Repentance for the forgiveness of sins. Prophets in earlier times had also spoke of this. Jesus became the final sacrifice, all for the forgiveness of sins, paying the price, all because of sin. God desires obedience, not sacrifice, and Jesus was obedient to delivering this news--obedient to God even when it meant his death.
No human sacrifice? What do you call the Holocaust if not human beings sacrificing their lives for their faith?