Christ dying for sins according to scripture shows that His Death was limited to s definite people. 1 Cor 15:3-4
3 For I delivered unto you first of all that which I also received,
how that Christ died for our sins according to the scriptures;
4 And that he was buried, and that he rose again the third day
according to the scriptures:
Now according to scripture He died as an Great High Priest as it was according to scripture Heb 2:17
Wherefore in all things it behoved him to be made like unto his brethren,
that he might be a merciful and faithful high priest in things pertaining to God, to make reconciliation for the sins of the people.
Heb 8:1
Now of the things which we have spoken this is the sum:
We have such an high priest, who is set on the right hand of the throne of the Majesty in the heavens;
He was an antitype of Aaron the High Priest of Israel, Aaron a type of Christ, Now I quote:
Now of the things which we have spoken this is the sum: We have such an
high priest, who is set on the right hand of the throne of the Majesty in the heavens; Now I quote:
. The high priest represented Israel only, when he bore their names upon his heart in the breast-plate of judgment, and when he entered into the holy of holies with the names of the twelve tribes upon his breast. He bare their judgment, and theirs only, before the Lord continually; for them he made intercession, and them he solemnly blessed. All this represented that great high priest who is passed into the heavens, Jesus, the Son of God. He took not on him human nature indefinitely, but he took on him the seed of Abraham that he might be the Goel, the kinsman of the heirs of promise, and so possess a legal right to redeem them. As their high priest, he made reconciliation for the sins of his people; for them he appears in the presence of God; them he represents; for them he intercedes, and them he will finally bless. He saves none but those for whom he intercedes; he intercedes for none but those for whom he died; he died for none but those to whom he stands related as their kinsman redeemer. A Defense of Particular Redemption - William Rushton
The difference however, The Israel under the Old Covenant was primarily comprised of Abrahams Physical seed, but under the New Covenant Israel has expanded to include people of all different nations which are Abrahams Spiritual seed. Nevertheless, the atonement is Limited to Israel gods chosen people and not all mankind, that would destroy the typology of scripture. Remember the text says He died according to the scripture.