He knew that God had approved this man as the Messiah. They believe he was a prophet, and God wouldn t allow that kind of treatment for a prophet. Indeed, Jesus prayed in Gethsemane for some other way, but there was no other way. Because Jesus died for us, for our sins, and we, because of our sins, came under a curse. Even our petty sins are as hideous to God as a crucifixion.
All humanity is accursed because of sin.
Jesus was crucified for every one of us. He took the pain, and the shame, that we deserve. But this is not the only analogy the Bible gives us, and Paul explains this particular view in only one of his letters. But it is not quite so simple. For one thing, we still die.