Human sacrifice was not part of the commandments from God.
In Jeremiah 19:4-6, Gd tells us that human sacrifice is so horrible a concept to Him, that it did not even come into His mind to demand it from His creation.
It was not a known practice to allow someone to die for the sins of others.Even the disciples did not know why Jesus had to die.
Why was Jesus' death hidden from the disciples?
The disciples failed to comprehend Jesus' explicit and repeated predictions of his coming crucifixion and resurrection because, even while he was revealing it to them, it was being “hidden from them” by the Lord Himself. And only the Lord could remove that incomprehension — which is exactly what Luke says happened.
All SACRIFICED animals had to be slaughtered by a priest, at the Temple (and prior to that, at the sanctuary), and that animal was treated differently - parts were burnt, parts went to the priests and levites, and the rest was returned to whoever brought it.
The Bible tells us Jesus was crucified for blasphemy. He was put on trial for his own sins and found guilty. Jesus was not sacrificed in the temple. He was crucified in a public area. The crucifixion was not performed by priests. The Roman guards then crucified Jesus.
John 19:23 23 When the soldiers crucified Jesus, they took his clothes, dividing them into four shares, one for each of them, with the undergarment remaining. This garment was seamless, woven in one piece from top to bottom.
Is Jesus' death a human sacrifice?
In response, God didn't sacrifice Jesus. Rather, Jesus gave up his own life. No one forced Him. He laid down His life willingly, as He made clear speaking about His life: “No one takes it from me, but I lay it down of my own accord. Jesus admits he took his own life even though he was crucified for blasphemy and sedition.
If Jesus claimed that only dead Jews could forgive sins using himself as an example. Then the Holocaust was totally justified. The world needed more Jews sacrificed for the growing population of Christian sinners.