Acts 20:
20For this cause therefore have I called for you, to see you, and to speak with you: because that for the hope of Israel I am bound with this chain.
Have you ever wondered why Paul spoke these words in that it is clear from other scripture that he was specifically designated by God to be a messenger to the gentiles ?
Acts 9:
15But the Lord said unto him, Go thy way: for he is a chosen vessel unto me, to bear my name before the Gentiles, and kings, and the children of Israel:
22:
21And he said unto me, Depart: for I will send thee far hence unto the Gentiles.
rom 11:
13For I speak to you Gentiles, inasmuch as I am the apostle of the Gentiles, I magnify mine office:
rom 15:
16That I should be the minister of Jesus Christ to the Gentiles, ministering the gospel of God, that the offering up of the Gentiles might be acceptable, being sanctified by the Holy Ghost.
Gal 1:
16To reveal his Son in me, that I might preach him among the heathen; immediately I conferred not with flesh and blood:
Gal 2:
2And I went up by revelation, and communicated unto them that gospel which I preach among the Gentiles, but privately to them which were of reputation, lest by any means I should run, or had run, in vain.
8(For he that wrought effectually in Peter to the apostleship of the circumcision, the same was mighty in me toward the Gentiles
9And when James, Cephas, and John, who seemed to be pillars, perceived the grace that was given unto me, they gave to me and Barnabas the right hands of fellowship; that we should go unto the heathen, and they unto the circumcision.
eph 3:
8Unto me, who am less than the least of all saints, is this grace given, that I should preach among the Gentiles the unsearchable riches of Christ;
Was preaching the unsearchable riches of Christ the same as preaching the hope of Israel ? Yes.
1 tim 2:
7Whereunto I am ordained a preacher, and an apostle, (I speak the truth in Christ, and lie not a teacher of the Gentiles in faith and verity.
2 tim 4:
17Notwithstanding the Lord stood with me, and strengthened me; that by me the preaching might be fully known, and that all the Gentiles might hear: and I was delivered out of the mouth of the lion.
Also, as an messenger to the gentiles foremost, He was an able minister of the New Covenant per 2 cor 3:
6Who also hath made us able ministers of the new testament[covenant]; not of the letter, but of the spirit: for the letter killeth, but the spirit giveth life.
Were the gentiles to partake of the New Covenant with the house of Israel ?
The answer to these questions are quite simple, the call of the gentiles and the hope of Israel are one and the same, the same gospel, the same hope rom 1:
16For I am not ashamed of the gospel of Christ: for it is the power of God unto salvation to every one that believeth; to the Jew first, and also to the Greek.
The Gospel that Paul preached, the hope of Israel that Paul preached is the same to the Jew First and also to the greek.
eph 3:6
That the Gentiles should be fellowheirs, and of the same body, and partakers of his promise in Christ by the gospel: