I think you must be using an “abbreviated” bible rather than the one approved by the ecumencal council.
I the authentic Bible, we have this passage:
Acts 8:14-18
14 Now when the apostles at Jerusalem heard that Sama’ria had received the word of God, they sent to them Peter and John, 15 who came down and prayed for them that they might receive the Holy Spirit; 16 for it had not yet fallen on any of them, but they had only been baptized in the name of the Lord Jesus. 17 Then they laid their hands on them and they received the Holy Spirit."
Which shows back in chapter 8 of the book of acts that Peter was opening the doors of the Kingdom of Heaven to the Gentiles.
And again in Acts 10:
Acts 10:34-46
34 And Peter opened his mouth and said: “Truly I perceive that God shows no partiality, 35 but in every nation any one who fears him and does what is right is acceptable to him. 36 You know the word which he sent to Israel, preaching good news of peace by Jesus Christ (he is Lord of all), 37 the word which was proclaimed throughout all Judea, beginning from Galilee after the baptism which John preached: 38 how God anointed Jesus of Nazareth with the Holy Spirit and with power; how he went about doing good and healing all that were oppressed by the devil, for God was with him. 39 And we are witnesses to all that he did both in the country of the Jews and in Jerusalem. They put him to death by hanging him on a tree; 40 but God raised him on the third day and made him manifest; 41 not to all the people but to us who were chosen by God as witnesses, who ate and drank with him after he rose from the dead. 42 And he commanded us to preach to the people, and to testify that he is the one ordained by God to be judge of the living and the dead. 43 To him all the prophets bear witness that every one who believes in him receives forgiveness of sins through his name.”
44 While Peter was still saying this, the Holy Spirit fell on all who heard the word. 45 And the believers from among the circumcised who came with Peter were amazed, because the gift of the Holy Spirit had been poured out even on the Gentiles. 46 For they heard them speaking in tongues and extolling God."
I find myself puzzled that you would think that Peter did not know how to behave toward the Gentiles? Perhaps your own private interpretation of scripture is somewhat lacking?
Nope, Jesus gave Paul the revelation while he was on his way to damascus. The Gospel to the gentiles was committed to Paul, not Peter.
Certainly Paul did have a revelation on the way to Damascus, and Jesus sent him to the Gentiles.
That does not subtract from the fact that Peter had a revelation BEFORE that, and was sent to the Gentiles FIRST.
Acts 10:9-11
Peter went up on the housetop to pray, about the sixth hour. 10 And he became hungry and desired something to eat; but while they were preparing it, he fell into a trance 11 and saw the heaven opened, and something descending, like a great sheet, let down by four corners upon the earth."
Peter opened the door for the Gentiles because he had the keys to the kingdom. Paul was not given those keys.
It’s really very simple… Peter was the first to receive the revelation from the Father that Jesus Christ is the Son of God. That was the Gospel to the Jews and Peter was the first to receive this key. This same revelation was also given by the Father to the rest of the disciples. It’s the belief in the heart and the confession that is the key. All believing Jews must possess this key.
I think it may have been Moses that got the first inkling about the Messiah. It must also be said that Isaiah had lots of clues, tho he may not have been able to put them all together. Also, one must consider Mary and Joseph, who had this truth announced to them by the angel of God. Mary was really the first Christian, since she placed her faith in Him at the time of the annuciation. however, I agree that Peter was the first of Jesus’ apostles to make this divine confession.