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Remaining a literal Jew means nothing.All of mankind has a chance for salvation through the blood of Jesus Christ.That is why at the end of the 70 weeks prophecy,it was fulfilled with Cornelius the Centurion and his family being blessed with holy spirit.God's blessing was for the Jew and the Gentile.All of mankind.It's in Acts 10.I think Peter was also right. He remained a Jew and was worried about that. The dream he had was a better way for The Lord to speak to him. (You guys must know the story of Peter's dream about eating animals, if not, it's in Acts).
23...The next day Peter started out with them, and some of the believers from Joppa went along.24 The following day he arrived in Caesarea. Cornelius was expecting them and had called together his relatives and close friends.
44 While Peter was still speaking these words, the Holy Spirit came on all who heard the message.45 The circumcised believers who had come with Peter were astonished that the gift of the Holy Spirit had been poured out even on Gentiles.
All who follow God and believe in Jesus are now spiritual Jews.That is why Paul spoke of circumcision of the heart.
Romans 2:29 No, a person is a Jew who is one inwardly; and circumcision is circumcision of the heart, by the Spirit, not by the written code. Such a person's praise is not from other people, but from God.
So we can see that being a literal blood Jew means nothing.It is those who are spiritual Jews.All who follow Gods commands.