Everyone's so fucking certain…
You know don't know for sure, right? I mean we know there's a loving God. We know Satan (singular or plural exists). Jesus as prophecy told in almost every myth and faith in human history turns out to be real.
But to be so certain of any details beyond that… It's foolhardy. There are commanalities and differences between all the prophecies. We don't know if they're ALL metaphor and codes, designed to only be fully understood AFTER THE FACT. Future proves past. Years in the making. As in millennia.
A tree? A cross? No crucifixion at all? A metaphor? A trial? Multiple meanings exist.
Sin? Inherited? Inflicted upon us? We have certainly sinned too. As a man, Jesus would have to have sinned. Did he die FOR our sins? Or did he give up something significant, whether it be "this life" he inhabited? But not as a sacrifice which washes away everyone's sins, but which is a symbol or example that leads us all to redemption from our own sins. So all men are not absolved of sin for his example, but rather he's a symbol that leads other men to do the same. Symbols will be their downfall.
None of us know how this played ot thousands of years ago, and none of us know how things are going to play out in the next year or two or ten. We're not supposed to know. Trust the Plan. Years in the making.