I have been considering your statements, but question certain wording of your points.
In God's model for Atonement "The Day of Atonement" in Lev 16 the life and death of Christ are depicted in the selection of the "Lord's Goat" a spotless victim that is slain as "the sin offering". So that is Lev 16:15.
The work on the "day of atonement" is perhaps better considered as the day of propitiation. For it was the shedding of blood that started the work of atonement. On the Cross, the shedding of blood was the start of the work of redemption.
The scope for the Bible concept of "Atonement" also includes vs 15-32 the work of Christ as High Priest. (Which is why we do not have universalism - even though we have a once-for-all completed atoning sacrifice at the cross).
Christ as "high priest" was the one
offering the sacrifice not the sacrifice itself, though He was the sacrifice.
Remember after in the garden He stated, "Don't touch me..." But, what then of the "work of the High priest." John calls that work "advocate."
But in the High Priestly work of Christ we have victory over sin - not merely the covering for the past - but the new creation "we have been RAISED with him" Romans 6 and in that work of Christ we are freed from slavery to sin - to sinning.
I am not certain that Romans 6 is presenting that we have "victory over sin," but that we
die to sin. That is, just as Christ died in our place taking on the sins of us, and not only us, but the whole of humankind from the beginning to the last, the believer must also die to the fleshly and be enslaved to God.
We are to "present yourselves to God as those alive from the dead, and your members
as instruments of righteousness to God."
Christ being the sacrifice, we are to be like Aaron, who did not present himself that day unwashed and in old filthy garments, but clean and with the appropriate robing.
Thus the 1Cor 10 statement that Paul makes about victory over sin that is made available to the saints - through Christ,
There is no "unreasonable God demands" in scripture.
in Christ,
Bob
Here again, you place the victory as some accomplishment that redeem have available. See, what Paul said, "Nevertheless, with most of them God was not well-pleased; for they were laid low in the wilderness." So, where is the "victory over sin" that you cite?
Christ paid in full the sin debt of all humankind for all time(s). (1 John 2)
What then is left? The same as was neglected by the "examples" that Paul discussed in 1 Cor.
The reconciliation (the true meaning of atonement) and throughout the OT that was that part of redemption that was missing and why "most ... were laid low." Not that God was reconciled to man (for that can not be) but that man must be reconciled to God.
That the "most" were not reconciled to God is why they were "laid low."
The question then is, "Why were they not reconciled?" Because they loved darkness rather than light. The attempted to hide from the light for fear the light would expose their evil.