The Bible is full of contradictions which the Christians, naturally, deny. it is true that the Bible offers weak eveidence of God's prohibition of human sacrifice; those who cliam it does offer merely three verses (Genesis 22:10-13, Leviticus 18:21, Deuteronomy 18:10); those who claim it doesn't offer more!
Nevertheless, historical evuidence of Jewish recorded sacrificial practices shows that the ancient Jews did not practice it or condone it, and that this prohibition was based on their interpretation of scriptures, naturally.
The idea that a man can be put to death in place of an animal to "please" God is not supported by any evidence of recorded Jewish history. Therefore the whole Christian idea of Christ being put to death as a sacrificial animal is baseless.
The other side of that coin is the Christian lack of understanding of Jewish sacrificial rites. Animal and grain sacrifices could be offered only for unintentional sins. For intentional sins, the only acceptable atonement was (and is) repentance, not spilled blood.
The Bible is clear that, once the Law has been instituted, no man can atone for another man's sins.
This suggestes that Christ could not die because he was a soul that didn't sin. This was the reason the Jews rejected the idea and called it a bluff. In other words, if it was true that Christ was without sin, then his death was faked because he couldn;t die. And if he did die, then he wans't without sin.
Finally, the Passover Lamb was not sacrificed as sin offering. the lamb did not atone for anyone's sins. Therefore Christ could not be a a Paasover Lamb that atones for anyone's (unintentional) sins.
The whole purpose of the Passover lamb was to show that Jews did not worship idols. They killed the Egyptian sacred animal and descertaed it by smearing its blood on their homes, and then ate the slaughtered animal. For their desecration of an idol god's spirit of God spared those homes from killing the firstborn, man and animal.
The animal that takes on the sins of man is not a lam but a (Yom Kippur) goat! No one ever compares Chirst to a Yom Kippur goat! The sinner lays his hands on the animal's head an "transfers" his sins onto the animal who is then either let go or killed, but never offered at the altar.
Clearly, the Christians changed things a little bit (to put it miidly) and made up a whole new religion from it.
Wrong again you can not adequately understand either the new testament nor the old testament on their own. The Bible [sola scriptura] is it’s own interpreter and no words of mere mortals can act as a substitute. The last chapter of the last book contains a warning to not add nor subtract anything to the Holy Word. Furthermore Jesus said the law and the sacrifices were there only to show the Jewish people the law is inadequate for salvation nor could be secured on their own good deeds or atonement.