Hebrews 1 says that the Lord Jesus 'by Himself purged our sins'.
This presupposes the immense need for sins to be purged at the Cross. And our dependence on His doing exactly that in a perfect way for time and for eternity.
We know Jesus died for the entire world. In fact because of what he did anyone who is born into this world has a clean slate of being clear of sin.
However we do still sin, by nature. Going to Christ helps in that, holding back the acts of sinning. Which we all do.
I still sin, and miss the mark, however before I was born Jesus already paid for my sin, your sin, my brothers sin, my coworkers sin, my clients sin, my sisters sins.
All of that was paid for one time on the cross, you are right and the account of Jesus blood covers all sin of all people.
However there is a different between those who believe who obtain new eternal life and those who do not but the wrath doesn’t abide on them as it pertains to Israel, in that day in context sir.
Are you understanding what I am saying?
John 3:36
Whoever believes in the Son has eternal life,
eternal principle.
but whoever rejects the Son will not see life,
Is still true.
for God’s wrath remains on them.
Only relates to the nation of Israel in context.