Um-m -I think you have missed the message of the Cross, and Paul rebukes you, in Romans 11.
Jesus is a Jew, and He is in fact, "Israel", the Firstborn Son of God of the New Man name, and YHWH come in flesh to be Kinsman/Redeemer to His own elect sons, first, who have the "adoption name" and to the Gentiles, last. That is what the Word teaches us.
To the Elect, namesake people, upon whom He invoked His New Man name as a sign of the adoption [second birth of Spirit, first] which was to come and is now come for whosoever will, He has given blinding of their eyes as a nation, until the fullness of the Gentiles is harvested and ingathered. He then turns to His own Namesake people of His New Man name, "Israel".
The human being, second creation, body of flesh in which Christ is come incarnate in as second Man and Son of God is the True Mercy Seat that His namesake people of the New Man name were give the type of, in the solid gold [incorruptible] cover to the Ark of the Covenant, to rehearse His Atonement upon, year by year, until it was fulfilled.
He was always going to come and die as Kinsman/Redeemer, to fulfill the Atonement. Everything about the Day of Atonement is all about Him, and only His Namesake people of the New Man name were given that to rehearse, as the Oracle of His Person and work, until it was fulfilled.
Psalm 118 is all about His being "bound to the altar of sacrifice", as "Our God", "our Salvation/Yeshua" [Israel's God, first, and the Gentiles who hear and believe, last], and the "Gate of entry into the City of God's Righteousness".
Psa 118:19 Open to me the gates of righteousness: I will go into them, [and] I will praise the LORD: This gate of the LORD, into which the righteous shall enter.
I will praise thee: for thou hast heard me, and art become my salvation/Yeshua.
The stone [which] the builders refused is become the head [stone] of the corner.
This is the LORD'S doing; it [is] marvellous in our eyes.
This [is] the day [which] the LORD hath made; we will rejoice and be glad in it.
Save now, I beseech thee, O LORD: O LORD, I beseech thee, send now prosperity.
Blessed [be] he that cometh in the name of the LORD: we have blessed you out of the house of the LORD.
God [is] the LORD, which hath shewed us light: bind the sacrifice with cords, [even] unto the horns of the altar.
Thou [art] my God, and I will praise thee: [thou art] my God, I will exalt thee.
Psa 118:29 O give thanks unto the LORD; for [he is] good: for his mercy [endureth] for ever.