The idea that folks are walking about with all their sins atoned, except for the sin of unbelief, is a common and fallacious notion, and I suspect it is the fruit of a noncalvinist attempt to justify God.
It is simple, Aaron, give an account of the Scripture stating the blood was NOT for all the world.
It should be easy to find out of one of the thirty-six or more times the NT uses the word.
But, ultimately, one either believes the Scripture or clings to a human scheme.
The Scripture uses the word “world” (meaning every human that has, is, and ever will live) as having the blood applied.
This is not MY scheme, it is the Scripture.
Unbelief will certainly prevent one from being saved from his sins, but, the law isn't something that was waiting to be satisfied and then nullified, like some threat in a war that needed to be neutralized. Christ's life and death indeed fulfilled the law, but that doesn't mean the law is now neutralized.
This is truly sad, Aaron.
For in this you are actually nullifying both the grace and the faith God grants that one believe.
How could Paul preach reconciliation to every person if reconciliation was limited by a lack of blood?
Certainly, that very important subject would dominate some portion of his writing?
What of John? He was eye witness to the whole crucifixion, standing with the very mother of Jesus at the foot of the cross. If ever one would, just from human desire of seeing evil people get their just desserts, it would be this one.
Yet, he was compelled to include the whole of all humanity in a specific statement about the actual blood of Christ.
Salvation resides in one word.
Belief.
The whole of Romans would point to that single word.
The focus of John is actually upon that single word.
It is still very much in effect judging one worthy, or unworthy. Christ on earth approached the law, and it judged Him worthy to receive glory and honor and blessing.
Perhaps in your exuberant desire, you forget that the picture of the one worthy is that of the slain Lamb.
That Lamb was given glory and honor of all heaven, not by the law.
Christ came to fulfill the law, not be judged by it.
We as believers are not judged by the law, because, in Christ, we cannot be judged, but stand as uncondemned.
Why?
Because those that
believe are saved (Romans), and those that
do not believe are condemned (John).
It is not the lack of blood, it is the lack of belief.
Anyone else that approaches the law is judged unworthy and is then cursed and condemned. The threat hasn't been neutralized. It's still thundering on the mountain top.
The wrath to come is coming because of sin AND unbelief.
Oh, but this is just not consistent with the single necessary to be saved.
The Christ is not sacrificed for each believer, but
once for all.
Therefore, it remains no longer of law condemning, but of unbelief.
The Judaizers would cling to the law, and attempt to conform Christ to the law.
However, humankind is no longer brought by law to seek redemption. For does not Paul clearly state to the Ephesians that it is by The unmerited favor of God granting the gift of faith that one is redeemed, not by “works of righteousness (the law)?”
How then can the law serve as other than a school teacher, pointing out the Christ?