This says otherwise.
"remember you were at that time, separated from Christ, alienated from the commonwealth of Isreal and strangers to the covenants of promise, having no hope and without God in the world." Ephesians 2:12
Christ is equated with Israel.
And the point of that passage is in light of Romans 1:18-3:30.
Prior to Romans 1:18-3:30's impact - prior to that - back when the issue had been the commonwealth of Israel and its' covenants of promise, those Gentiles who blessed Israel were blessed in turn.
While those Gentiles who submitted to Israel's Covenant of Circumcision and the Law were as one of the nation of Israel.
Both these kinds of Gentiles had to do something towards said blessing.
For the Gentiles were without (outside of) all that because God had given them up to their own ways just before He called Abram out from among them and began a next phase in His plan and purpose as to His reconciling of the Earth back unto Himself.
That was before what Rom. 3:21.
But Now, Rom. 3:21 and Eph. 2: 13 in light of Rom. 3:21 - But Now - IN CHRIST...
...all that has been temporarily set aside, and both have equal access to God in His New Creature: the Body of Christ, given God's plan and purpose as to His reconciling those fallen Heavenly places back unto Himself.
This New Creature is comprised, not of the nation Israel, nor of the nations, but of individuals, regardless of national status - "for ALL have" been concluded as having "sinned" or "come short of the glory of God."
In this, it is absolute, replacement theology nonsense to conclude that Gentile individuals made nigh together with Jewish individuals - not nations, nor the nation Israel, are now Israel.
But Now is IN Christ.
In this NEW Creature that God is forming IN CHRIST.
That is neither Isaiah 2:1-5; nor does it negate it.
Isaiah 2:1-5 concerns God's plan and purpose for HIS reconciling of the Earth back under HIS dominion thru ISRAEL as HIS Kingdom of Preists, Ex. 19:6.
Exodus 19:3 And Moses went up unto God, and the LORD called unto him out of the mountain, saying, Thus shalt thou say to the house of Jacob, and tell the children of Israel; 19:4 Ye have seen what I did unto the Egyptians, and how I bare you on eagles' wings, and brought you unto myself. 19:5 Now therefore, if ye will obey my voice indeed, and keep my covenant, then ye shall be a peculiar treasure unto me above all people: for all the earth is mine: 19:6 And ye shall be unto me a kingdom of priests, and an holy nation. These are the words which thou shalt speak unto the children of Israel.
Unless verse 4 is also the metaphor that fools continually assert the rest of that supposedly is.