I can’t answer for porthos11 meltzerboy.
So this may differ.
But when you asked . . . .
What “infinite offense” do Christians believe “man committed against G-d”? Are you referring to original sin?
This might help.
Keep in mind, God is omnipresent, eternal, infinite, etc.
When Adam sinned against God, it is a transgression against . . . . God.
Seems painfully obvious but please bear with me here for a moment.
(The same is true for us incidentally. When we sin, we sin against ALL of God too.
But I will use Adam as an example here to eventually show the effect sin had on Adam [and Eve’s] progeny.)
I am not going to go through verses and catechetical proofs here significantly. I’ll do that later if you or someone else would like me to.
Adam (and Eve, but I will just use Adam for my example) sinned against God.
**A sin against God, is a sin against “ALL” of God.
That sin just “keeps on giving”.**
God is perfectly merciful, but God is ALSO perfectly JUST.
With God’s justice, God is going to have to demand a perfect atonement (but mere mankind could never give that to God because we are finite creatures and it would require and **infinite **sacrificial atonement).
In the Old Covenant we have prefigurements and foreshadowings of atonement for sin, but it is never enough.
It is never completely atoning.
That’s almost certainly WHY King David in Psalm 40, can say “sacrifices and oblation you desired not”. And Isaiah says, “I delight not in the blood Of bullocks, or of lambs, or of he-goats.”
But in another sense God DID desire sacrifice and oblation. (In the Levitical Priesthood RE: its teaching sense).
Since the Jewish people were custodians of “the Law”, these foreshadowings (especially circumcision) acted as an “advantage” for them as St. Paul says in Romans 3:1-2.
Yet in another sense (in a definitive permanent atoning sacrifice for sin sense) God did NOT desire “the blood Of bullocks, or of lambs, or of he-goats.”
BOTH are true but they are true in differing senses.
Keep in mind . . . . .
The Lord your God is one God!
But God also reveals to us that He is three Divine persons in this one God.
Jesus (one of those persons who is God) took upon Himself a human nature (but His Divine nature remains) via flesh of the Virgin Mary or as St. Paul says, “made of a woman” in Galatians 4:4 (sometimes translated as “born”)
That doesn’t surprise us. Eve was miraculously made from the flesh of a man.
When Adam was brought into the world, God “breathed” life into him.
And Eve was made from the flesh of Adam (again, in the New Covenant, the flesh of the Virgin Mary is used by the power of the Holy Spirit to give Jesus His human nature).
Adam (and Eve) did not have God dwelling in them in the fullest sense, but Adam and Eve DID have “Original Justice” (see CCC 384 and 400).
When Adam and Eve fell, their nature changed immediately. They in a sense, died.
Now they had only a dead or fallen nature.
St. Paul (who studied at the feet of Gamaliel) said mankind now became “children of wrath” by their very “NATURE”! (In Ephesians 2)
St. Paul also said “flesh and blood cannot inherit the kingdom of God, nor does the perishable inherit the imperishable.” He is talking about the same thing. He is talking about mere perishable humanity.
So now the best Adam and Eve can do . . . . is pass on “their nature” to their offspring.
Even in this fallen state, their nature is still sublime. It is very lofty. But it is not enough to atone for sin.
God promises to send the kinsman-redeemer to redeem mankind to atone for sin (but so much MORE too).
But if He is our “kinsman” he must be fully human.
If he is not fully human He cannot be our “kinsman”.
Man cannot become God, but God can take flesh and a human nature upon Himself.
And He did (miraculously).
Jesus is THE Priest. His priesthood is not based upon genealogy. Jesus is a Jew (Kingly Tribe), not a Levite (Priestly Tribe).
But His priesthood is on the order of Melchizedek (As Psalm 110 reminds us, The LORD hath sworn, and will not repent: ‘Thou art a priest for ever After the manner of Melchizedek.’)
This singular priesthood that belongs solely to Jesus Christ (but we have varying “shares” in), is not within bounds of flesh and blood genealogies.
Caiaphas ripped his priestly garment interrogating Jesus. Something that the high priest should never do in this context.
Jesus, then acting as both High Priest and spotless victim on Calvary, has HIS seamless garment taken, but NOT rended, then offers Himself as an “acceptable” sacrifice to the Father on the hill just outside of Salem (Jerusalem).
Jesus is both Priest and Sacrificial Victim in the fulfilled sense.
Why could that help ME?
Because in Baptism, baptism doesn’t merely bring about the “forgiveness of sins”, but it puts us IN Jesus and He in us too!
We become “sons in the Son”. (We become united with one another in Christ too.)
St. Paul again . . . .
1st CORINTHIANS 12:12-13 12 For just as the body is one and has many members, and all the members of the body, though many, are one body, so it is with Christ. 13 For by one Spirit we were all baptized into one body - Jews or Greeks, slaves or free - and all were made to drink of one Spirit.
Still Baptism is but a beginning. And still the wages of sin is “death”. And this “wage” must be “paid” by US . . . but us IN Him.
We are able to be UNITED in a death like His.
So assuming we remain “in Him” and He “in us”, . . . their is a “completion” of sorts on the last day when we get our bodies back in Heaven.