> The key is that the victim is this time celebrated as to be in the right
Yes, you're absolutely right -- except maybe for the part of "most modern morality"... the Latin dictum "vae victis" was embraced throughout modern times.
That said, having the victim come back from the dead is kind of cheating.
>the Latin dictum "vae victis" was embraced throughout modern times.
Indeed, but that was and will always going to be (including in modern times).
What Christianity did was shape a morality where this was increasingly considered bad (as opposed to "just the way of the world"), not shape a world where this was eliminated.
This has a large effect on many practices and beliefs.
The twist is in fact a different one -- "sacrifices, dies but lives again" is older.
The key is that the victim, normally a scapegoat the city is happy to get rid of, is this time celebrated as to be in the right. This is a turning point in putting the victim as noble (as opposed the punishers as noble), on which most of modern morality is based on (Old Testament-following puritans aside).