Yes, God hates human sacrifice which the nations practiced and Israel sometimes copied. But to compare the sacrificing of a child against their will, to Jesus willingly laying down His life so that we could have eternal life, is a gross misunderstanding. I’m really not sure why you have a problem with this. Read again the following quote… Your own Rabbis didn’t used to see this as a problem. They understood this because they knew that God was far to holy to simply approach on the basis of our own good works. They knew that it was God who demanded a blood sacrifice. For example, consider the following Rabbinic quote concerning Zech 12:10
 
Rabbi Moshe Alshekh on the Messianic implication of Zech 12:10 
 
“I will do yet a thing, and that is, that ‘they shall look unto me for they shall lift up their eyes unto me in perfect repentance, when they see Him whom they have pierced’, that is Messiah, the son of Joseph; for our Rabbis, of blessed memory, have said that He will take upon Himself all the guilt of Israel, and shall then be slain in the war to make atonement in such manner that it shall be accounted as if Israel had pierced Him, for on account of their sin He has died; and therefore, in order that it may be reckoned to them as a perfect atonement, they will repent and look to the blessed One, saying, that there is none beside Him to forgive those that mourn on account of Him who died for their sin: this is the meaning of ‘they shall look upon me.’”
 
Rabbi R. Elyyah de Vidas on Isaiah 53  

“The meaning of ‘he was wounded for our transgressions, ... bruised for our iniquities’ is, that since the Messiah bears our iniquities, which produce the effect of His being bruised, it follows that whoever will not admit that the Messiah suffers for our iniquities must endure and suffer for themselves.”  
 
Now, you may say that Gnostics made up Jesus out of thin air and simply copied other pagan thoughts but you would have to be an idiot not to see that Jesus did exactly what these Rabbi’s said the Messiah would do. No, not a copy of pagan thought, but a fulfillment of what the Rabbi’s said that the Messiah would do taken straight from the Old Testament. Nothing Pagan ‘bout that!. Let’s just state a few of the things that these Rabbis said the Messiah would do:
 
Be the Son of Joseph (and therefore, like Joseph, be rejected by his brothers)
Make atonement through his death by taking the guilt of Israel upon Himself
Be pierced on account of their sin
Die for their sin
Bear Israel iniquities
According to this Rabbi, “anyone who doesn’t acknowledge that Messiah suffers for our iniquities must endure and suffer for themselves.”
 
I went to Rabbi Singer’s website and he had an article stating that one man could not make atonement for others sins (in an effort to discredit Jesus). Singer wrote “The prophets never instruct the Jews to worship any crucified messiah or demigod; nor does scripture ever tell us that an innocent man can die as an atonement for the sins of the wicked.  Such a message is utterly antithetical to the teachings of the Jewish scriptures.”
 
That the Messiah would die to make atonement for sins may be utterly antithetical to the teachings of Singer himself, but they are in perfect agreement with what Judaism used to believe – based on those same Jewish scriptures.
Rabbi Moshe Alshekh above states that the very reason the Messiah would die is to “make atonement”, and that He bears their sin “in order that it may be reckoned to them as a perfect atonement.” This is exactly the message that I preach concerning Jesus. This I understand because it lines up perfectly with the Old Testament blood sacrifices and prophetic scriptures and history records it as having happened.
 

You are saying that because it was prophesied when the Messiah would be cut off that that means that Jesus had no choice as to whether He would lay down His life or not. Hopefully you can see how silly that is. God is outside of our time and space and can declare the end from the beginning. Exactly what He has done in the Bible. He has prophesied many things in the Bible as I know you are aware. Because God prophecies events before they come about in no way makes the person/people involved in the prophecy a robot without choice or responsibility.

Let’s take your argument and apply it to the nation of Israel. Many times, starting with Moses and thru the prophets it was declared that Israel would be scattered amongst the nations because of their disobedience to God. If we take your argument, that would mean that because it was prophesied that it would happen, then Israel had no ability or choice in the matter. It would of course make them innocent in the matter of their disobedience because they had no choice, it had to happen!

See how stupid this line of thought is? God knowing all things and seeing the end from the beginning doesn’t make human choice and responsibility irrelevant. In like manner, God declaring that the Messiah would be ‘cut off’ and die doesn’t mean Jesus had no choice in the matter. He willingly lay down His life to atone for your sin. You dishonour His name by calling this a sacrifice God hated. I'm sure there were many Israelis who gave their life willingly so that others may live in the wars of 1948, 1967, or 1973. Even though they willingly laid down their life for others, no one would call their death a human sacrifice hated by God! You wouldn’t do that with an Israeli who lay down their life today so that others can live, so it is a strange piece of logic that twists Jesus’ death on our behalf into something God or man should despise.