>>73093
>Send your son knowingly to his gruesome death
Which Jesus knew about, and willingly submitted to. Matthew 26:53-54 show that.
>to pay for the "sins" you, as the owner of all human beings, have ascribed to them.
"Sin" means something like "deviation". To sin means to stray. God, then, hasn't ascribed sin to us, rather sinning is what we do by deviating from the path He has laid down for us. Which brings us to free will.
Now, if you stray from the path of ultimate goodness - God -, how can you expect to reap the fruits of staying on the right path? That's why sinners aren't united with God. This doesn't mean they're never united to Him, but as sinners, they aren't. Once their sins are forgiven, once they are on the right track again, God accepts them. That takes most of the punch from the doctrine of sin as it is commonly taught nowadays.
>Not only that, none of them are allowed agency
Where'd you get that from? Of course humans are allowed agency. God could withdraw our free will easily, but chose not to, which I don't think you'd object to.
>and their "sin" is considered hereditary for all eternity.
What I said above. "Sin" does not necessarily mean a moral transgression.
>Not to mention how absurdly pointless it is to "test" mortals when you are yourself omniscient.
Considered that Job might be allegorical? As early as Augustine, it was widely acknowledged that not all the Bible was to be taken literal. Before him, I don't think anyone took it literal either. But count on evangelists to do just that, because they're idiots. Thing is, evangelists are a new development, and not at all representative of Christianity.