The ROmans killed Jesus, at the behest of the Jews

They had a choice

what if the Jewish leadership had said... Yes great you are our messiah come from GOd?

what if they had worshipped him as God?

they would not have killed him

it gets pretty complex :)

The question of sin and atonement is very complex and ive not heard a good enough explanation of it, but there are things we dont know .... yet

this may inspire me to write a story :) or at least to think about it