Quoting Fred I think we can agree that Paul was sent to teach the Gentiles something different than what the other apostles were teaching. Remember that Paul got into some major arguments with the Jewish Christians who were cleaning the law and trying to get the Gentiles to switch to obeying the Jewish laws. I'm thinking specifically of the book of Galatians 2:11-21. In fact Peter capitulated to Paul's argument and allowed Paul to continue his ministry. In fact Peter confirm this near the end of his ministry, 2 Peter 3:15 Also, regard the patience of our Lord as [an opportunity for] salvation, just as our dear brother Paul, according to the wisdom given to him, has written to you. 16 He speaks about these things in all his letters, in which there are some matters that are hard to understand. The untaught and unstable twist them to their own destruction, as they also do with the rest of the Scriptures.
Galatians 2:
14.
But when I saw that they walk not uprightly according to the truth of the Gospel, ....................Apostle Paul, himself agrees and acknowledges that there is one truth of the Gospel, that they similarly supposedly share in faith with one another. And here whether they in wisdom have come to perceive or not, but in action to Paul they seem not to walk uprightly accordingly. This is probably according to the enhanced wisdom given Paul by our LORD, in revelation understanding thoroughly more about the truth of the Gospel in depth. Where he indeed witness they walk not uprightly, here in the matters of communing with the Gentiles. Seemingly, they are still bound by the Law of Moses in 'division', between the circumcised and uncircumcised, which as to Paul, CHRIST have had them 'abolished', even circumcision in another matter.
It was Apostle Peter's action that caused the chain reaction of the other Jews there to follow, segregating themselves from tables of the Gentiles, when he saw James' men from Jerusalem, sent for him. In the church of the Jews in Jerusalem, not everyone are fully converted to the teaching and faith of the truth of the Gospel. Even Apostle Paul, at one time when he went to see Peter in Jerusalem, he witnessed there were 'sneaked in Jews' among believers. Apostle Peter and many of the Jewish Christians still remain in Jerusalem and Jerusalem church, with James as the leader. Therefore persecution of Jewish Christians, especially the disciples of CHRIST, following JESUS whom they crucified, is even greater than Apostle Paul out there. Moreover Paul is the most wanted man by the Jews in Jerusalem, where he once escaped persecution, let down by a basket, and since never returned.
Apostle Peter did not have issues to meat with Gentile Christians, as prior to this, in Joppa, the house of Simon, he already received a 'vision', in regards to the Gentiles, as they are equally clean and accepted by GOD. And due to this 'vision', he then boldly proceeded to the house of Cornelius, the Gentile in order to ordain them equally in faith with CHRIST.
Peter 'capitulated' not to Paul's enhanced revelational doctrine in full truth of the Gospel, according to the wisdom given him. And which himself did claim it is difficult to understand, while there are others who twist them, so they do other Scriptures, to their own destruction. But rather Peter was pierced of his 'hypocrisy', claimed Paul, in pleasing the Jews from the Gentiles, when put to the 'test of faith'.
Today, from that day Apostle Peter did not have in compilation these writings, even Paul's, to study and refer, in order to perceive in sound doctrine knowledge, the full truth of the Gospel. Yet, we have them in 27 books compilation and with the Help of the HOLY SPIRIT, that is from the Gospel according to Matthew till the Gospel Revelation according to John. Where each of them have 'testified' 'differently' in doctrine, while there are some similarities rather, inspired as their individual account and according to the wisdom given them.
Does this mean according to some believers, that from the compilation of 27 books in the New Testament, each testified even ones extensively in revelation from the LORD, and according to the gifts and wisdom given them individually, we are to distinguish and choose which teaching is for us, and which is for the Jews...?
This is evidently as a result today, to the various divided 'denominations', even their believers as a testament here, having accepted, as Apostle Paul said it, 'another jesus and another spirit'. And their testament in division, debunks 2 Timothy 3:16&17, period
P.S. Therefore i hope in their church they do segregate the Jews from the Gentiles, and give them as a sermon from the LORD, their individually given Gospel Scriptures in the New Testament. That is the twelve testified for the Jews alone 'verses' and sermon for the day, and Paul's testified version for the Gentiles 'verses' and sermon for the day, as individual doctrine for both for the day building them up divided in faith. And too pray divided from one another to GOD.