G-d has revealed to us that He is not a man or a son of man in whom there is no salvation. "Do not trust in princes, or in the son of man, who has no salvation." (Psalm / T'heillim 146:3). The Christian bible calls Jesus the "son of man" over 77 times. It is not the Jews who are blind! Human beings cannot be sacrificed -- by the high priest or anyone else. BTW the only lambs sacrificed for sin were FEMALE.
Aside from the fact that human sacrifice is forbidden, Torah tells us that a proper sacrifice must be of a kosher, domestic animal (the animal is often identified as a bull, a seh (goat or lamb), etc (see Sh'mot / Exodus 13:13; Vayikra / Leviticus 22). Jesus, being a human (or even a demi-god) was obviously not a kosher animal and thus was unacceptable as a sacrifice.
The sacrificial ritual must be administered by a Jewish Priest (see Vayikra / Leviticus Chapters 1-7). According to the accounts in the Greek Testament (Christian Bible), Jesus was crucified by Roman soldiers (Matthew 27:35; Mark 15:24; Luke 23:33; John 19:18, 23). Some Christians may say that Jesus was a priest "like Melchitzedek" -- but Jewish sacrifices had to be brought by Jewish priests who were of the tribe of Levi and descended from Aaron (Moses' brother) -- which would exclude Jesus (see Sh'mot / Exodus 29:9 and Bamidbar / Numbers 25:13 for two of many references). The so-called priesthood of "Melchitzedek" is non-existant (the King of Salem was a king of righteousness -- which is what the words "malki and tzedek" mean). The King of Salem (Shem) in B'reshit / Genesis was NOT Jewish ergo his priesthood had nothing to do with Judaism or Jewish sacrifices! In Psalm / T'hellim 110 where the phrase is used again it is simply referring to King David who was also a king of righteousness (malki - tzedek).
Torah further tells us that the blood of the (cheit / sin) sacrifice had to be sprinkled by the Jewish Priest on the veil of the sanctuary and on the altar in the Temple (e.g., Vayikra / Leviticus 4: 5-6). Christian Bible evidence clearly shows this was not done.
Then it tells us that the (cheit / sin) sacrifice must be without any physical defect or blemish (e.g., Vayikra / Leviticus 4:3). According to the various accounts in the Christian Bible, Jesus was beaten, whipped, and dragged on the ground before being crucified (Matthew 26:67, 27:26, 30-31; Mark 14: 65, 15:15-20; Luke 22: 63; John 18:22, 19:1, 3). Moreover, as a Jew by birth, Jesus was circumcised on the eighth day after being born, a ritual that leaves a scar ("sign of the covenant"). According to the Christian Bible, circumcision is tantamount to mutilation (Philippians 3:2, Galatians 5:12).
Torah says that the Passover animal was to be a male-goat, be offered on an individual (per household) basis (Bamidbar / Numbers 28:22), not as a communal offering. According to the Christian Bible, Jesus’ death (termed a “sin sacrifice”) expiated the sins of mankind (Romans 6:10; Hebrews 9:12, 10:10, 10:18 ). It was not a sacrifice -- it was a celebratory offering to G-d (read the bible!).
The phrase the "lamb of god" is pagan. Read up on Greek gods. . . the Jewish sacrifices of bulls, goats, sheep, birds, etc. were all of pagan gods to show the power of the real G-d over false gods. . . they are for us (not for G-d) -- a gift from G-d to man. . . more on that if you desire an explanation.