Lively: Salvation to the Gentiles was not part of the gospel on Pentecost either was it....
Yes, it was. You're incorrect on that point. All I have to do is cite the great commission.
Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost.
Jesus made that statement before Pentecost. The Gospel was for all the world, both Jew and Gentile, from the very beginning.
Lively: There were Jews in all nations...
Act 2:5 And there were dwelling at Jerusalem Jews, devout men, out of every nation under heaven.
Now consider the following which is absolute evidence God had not granted repentance unto life for the Gentiles until Cornelius and family and all gentiles..
Act 11:18 When they heard these things, they held their peace, and glorified God, saying, Then hath God also to the Gentiles granted repentance unto life.
Act 10:4 And when he looked on him, he was afraid, and said, What is it, Lord? And he said unto him, Thy prayers and thine alms are come up for a memorial before God.
Act 10:5 And now send men to Joppa, and call for one Simon, whose surname is Peter:
Act 10:6 He lodgeth with one Simon a tanner, whose house is by the sea side: he shall tell thee what thou oughtest to do.
Act 10:28 And he said unto them, Ye know how that it is an unlawful thing for a man that is a Jew to keep company, or come unto one of another nation;
but God hath shewed me that I should not call any man common or unclean.
Act 15:7 And when there had been much disputing, Peter rose up, and said unto them, Men and brethren, ye know how that a good while ago God made choice among us, that the Gentiles by my mouth should hear the word of the gospel, and believe.
Act 15:8 And God, which knoweth the hearts, bare them witness, giving them the Holy Ghost, even as he did unto us;
Act 15:9 And put no difference between us and them, purifying their hearts by faith.
Act 15:13 And after they had held their peace, James answered, saying, Men and brethren, hearken unto me:
Act 15:14 Simeon hath declared how God at the first did visit the Gentiles, to take out of them a people for his name.
Act 15:15 And to this agree the words of the prophets; as it is written,
Act 15:16 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:
Act 15:17 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.
Act 15:18 Known unto God are all his works from the beginning of the world.