Also tell your friend to examine the verses that he gave you. Acts 15:23-24
'This is the letter they took along with them: This letter is from the apostles and elders, your brothers in Jerusalem. It is written to the Gentile believers in Antioch, Syria, and Silicia.
Greetings! We understand that some men from here have troubled you and upset you with their teaching, but they had no such instructions from us. So it seemed good to us, having unanimously agreed on our decision, to send you these official representatives, along with our beloved Barnabas and Paul.
Who have risked their lives for the sake of our lord Jesus Christ. So we are sending Judas and Silas to tell you what we have decided concerning your question. For it seemed good to the holy spirit and to us to lay no greater burden on you than these requirements......'(New Living Translation)
Notice the portion in bold. The apostles were not the ones divided on the circumcision issue. They just clarified things for the congregation because of a teaching that someone tried to bring into the congregation.
Also, I don't know if I was clear in my previous post, but I said all that to say that the Gentiles were ALWAYS a part of the Abrahamic covenant. It was not a change based on the Jews lack of reception of Jesus. Okay, that's it I'm done.