According to John, Jesus was (is) the Word and the Word was (is) God and He was the creator.
John 1:1-10. And in vs 14 He was made flesh (a Jew).
Then John 1:11 states “He came unto his own, and his own received him not.” He went to the Jews (And offered them the Kingdom of David) but they rejected him. However, according to John 1:12 “But as many as received him, to them gave he power to become the sons of God, even to them that believe on his name:”. This would be the Jews who believed on His Name. But what about the Gentiles?
Let’s look at the words of Jesus while he walked on the earth.
Matt 10:5-6 “These twelve Jesus sent forth, and commanded them, saying, Go not into the way of the Gentiles, and into any city of the Samaritans enter ye not: But go rather to the lost sheep of the house of Israel.”
And again in Matt 15:24 “But he answered and said, I am not sent but unto the lost sheep of the house of Israel”.
The twelve continued this even after the resurrection and ascention:
Acts 2:14 “But Peter, standing up with the eleven, lifted up his voice, and said unto them, Ye men of Judaea, and all ye that dwell at Jerusalem”
And again in Acts 3:12 “And when Peter saw it, he answered unto the people, Ye men of Israel, why marvel ye at this?”
Even Saul after his conversion went to the Jews: Acts 9:20 “And straightway he preached Christ in the synagogues, that he is the Son of God.” Acts 9:22 “But Saul increased the more in strength, and confounded the Jews which dwelt at Damascus, proving that this is very Christ.“
This JEWS ONLY continued for many years as evidenced in Acts 11:19 “Now they which were scattered abroad upon the persecution that arose about Stephen travelled as far as Phenice, and Cyprus, and Antioch, preaching the word to none but unto the Jews only.”
And Saul continued this practice even after changing his name (Acts 13:9) from Saul to Paul: Acts 13:16 “Then Paul stood up, and beckoning with his hand said, Men of Israel, and ye that fear God, give audience.”
But the Gentiles started to hear Paul Acts 13:42 “And when the Jews were gone out of the synagogue, the Gentiles besought that these words might be preached to them the next sabbath”
And as the Jews spoke against Paul he turned to the Gentiles “Then Paul and Barnabas waxed bold, and said, It was necessary that the word of God should first have been spoken to you (jews): but seeing ye put it from you, and judge yourselves unworthy of everlasting life, lo, we turn to the Gentiles.”
But did Paul turn his back on his own people? Nay He just obeyed the Lord and opened the door of Salvation to the Gentile world.
Romans 3:29 Is he the God of the Jews only? is he not also of the Gentiles? Yes, of the Gentiles also:
Romans 9:24 Even us, whom he hath called, not of the Jews only, but also of the Gentiles?
Romans 11:13 For I speak to you Gentiles, in as much as I am the apostle of the Gentiles, I magnify mine office:
Paul stated further:
Galatians 2:8 (For he that wrought effectually in Peter to the apostleship of the circumcision, the same was mighty in me toward the Gentiles:)
1 Timothy 2:7 Whereunto 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 Timothy 1:11 Whereunto I am appointed a preacher, and an apostle, and a teacher of the Gentiles.
The Apostles had a ministry to reach the Jewish nation with God’s good news (Salvation) and Saul (Paul) was commissioned by God to go to the Gentiles. Thus, Paul’s epistles were written to Gentile Churches which also had believing Jews.