Why Jesus' sacrifice is deception?

Churches‘ teachings of Jesus as a sacrifice to his father God free human from sins is completely a drama and deception! It does not work nor is logic.

1) From bible script itself stated human sacrifice is sin, forbidden by God, and from legal aspects of modern day civilizations it is unlawful, human sacrifice is not accepted for any moral and legal sense.
So the major foundation of Jesus' sacrifice could not be accepted for any sense as a normal human being with common sense. So Jesus' sacrifice is not valid, it is only valid toward the crowd who believe in and practice human sacrifice, who is a group should be hated by a moral God.

Christianity has a false belief foundation from moral and legal aspect.

2) From the historic aspect, whether it is a true history that Jesus did sacrifice himself to save sinful human? When I questioned Christians what is the moral base of this Jesus' human sacrifice?

Their answer is We(christians) did not sacrifice Jesus by murdering him, Jesus sacrificed himself on his own will for our sin, that is why we honor him and believe he is our savior.

Sounds pretty cool with an answer like this.

But christians do not want to confront this obviously illogical truth: they also agreed that Jesus was arrested and prosecuted and was nailed on cross by jews and romans. He was executed along with 2 other criminals. So a big question arise: how can you call an execution of criminals a self sacrifice on Jesus' own will? He is not the one who wanted to devote his life for anybody's sin but his own sin! It does not matter this sin that was charged by the court was in fact a legal charge in the eyes of christians, it is a historic fact Jesus was executed not for his own self give-up will but he was murdered by the jewish/roman court. With this fact, christians' answer of Jesus' willingly give up his life for whoever is not a valid! It is really a weasel answer.

My conception of Christians' preach is they are a group of people who do whatever they could to twist and lie to make their belief and statement sound valid, although it is obviously not valid nor logical at all. They are a group of weasels for sure.