It strikes me that the idea that "Jesus died for our sins" is morally bankrupt. It seems to be a pretty clear example of scapegoating, which in other cultures is viewed in a very negative light.
Why do Christians think that making Jesus a scapegoat is a good message? And given that, why would the cross be seen as a good symbol of the faith?
The question is really, Why was it necessary for Jesus to die?
In terms of Judaism in 30 CE Judea, the scapegoat is a respected and ancient idea, mentioned in Leviticus 16:18 ─ the sacrificed animal takes with it the blame for deeds offensive to Yahweh which members of the community have committed.
And getting god, or the gods, onside with animal sacrifices is found in very many ancient religions ─ not only Judaism but in Egypt, Mesopotamia, Canaan, Greece, Rome, Persia, among the Celts, Germans and Norse, and so on.
In all those cultures the top of that scale is human sacrifice. In the Tanakh we have Abraham and Isaac (apparently as a test of faith, called off), Jephthah's daughter (in return for military victory, carried out), the seven descendants of Saul (blood price, carried out) and Jonah (appeasement to stop the storm, initiated but transformed).
According to the NT, Jesus knows from the start of his mission that he's going to be killed at the end of it. Since Jesus is a circumcised Jew, the only coherent explanation appears to be that he too is such a sacrifice.
In Mark (the earliest gospel and the basis of Matthew and Luke and more loosely John), Jesus doesn't become the son of Yahweh until his baptism, expressly in accordance with Psalm 2:7, so the argument is available that his sacrifice is consistent with his culture. However, in (Matthew and) Luke he's recast as the literal son of Yahweh, with Yahweh's Y chromosome, so the sacrifice concept goes rather off the map.
To the modern mind, the idea that an omnipotent omniscient benevolent god would expiate the sins of mankind by sending the son of his loins to be killed is absurd. If Yahweh wants to forgive the sins of mankind, he has only to snap his omnipotent fingers and
voilà!
But this is now. That was then.