The God of Israel, the God of the Jews, and yet… through the Only Begotten Son, Jesus Christ, He is God of ALL. Yes, GOD of ALL!
Our God is willing to be God to all who would seek Him, leaving none from that promise. It doesn't matter what religion a person is born into, finds him or herself in, God the Father wants to be God to all. He is NOT a God who demands obedience blindly, offering nothing, giving no hope. He is a God with PROMISES to all of us! These promises, as all of His promises, will be fulfilled! We have HOPE in God through Christ Jesus by the Holy Spirit! HOPE.
Articles on Romans by E. J. Waggoner Chapter 15 Excerpt
The "Tabernacle of David."
At the time when the apostles and elders were assembled in Jerusalem, Peter told how he had been used by the Lord to carry the gospel to the Gentiles. Said he, "God, which knoweth the hearts, bare them witness, giving them the Holy Ghost, even as he did unto us; and put no difference between us and them, purifying their hearts by faith." Acts 15:8, 9.
Then James added, "Simeon hath declared how God at the first did visit the Gentiles, to take out of them a people for his name. And to this agree the words of the prophets; as it is written, After this I will return, and will build again the tabernacle of David, which is fallen down; and I will build again the ruins thereof, and I will set it up; that the residue of men might seek after the Lord, and all the Gentiles, upon whom my name is called, saith the Lord, who doeth all these things. Known unto God are all his works from the beginning of the world." Acts 15:14-18.
That is, the house of David is to be built up only by the preaching of the gospel to the Gentiles, and the taking from them of a people for God. And this was the purpose of God from the beginning, as the prophets witness, that through his name whosoever believeth in him shall receive remission of sins." Acts 10:43.
"The Blessing of Abraham." Again we read that "Christ hath redeemed us from the curse of the law, being made a curse for us; . . . that the blessing of Abraham might come on the Gentiles through Jesus Christ; that we might receive the promise of the Spirit through faith." Gal. 3:13, 14. The curse that Christ was made for us, was the cross, as is stated in the words omitted from the text just quoted.
Therefore we learn that the promises to the fathers were assured only by the cross of Christ. But Christ tasted death for every man. Heb. 2:9. He was "lifted up, that whosoever believeth in him should not perish, but have eternal life." John 3:14, 15. Therefore the promises made to the fathers were simply the promises of the gospel, which is "to every creature." By the cross, Christ confirms the promises made to the fathers, in order "that the Gentiles might glorify God for his mercy."