It was also at that Council that Peter and the 11 realized that the nation Israel was NOT going to accept Christ as their Messiah, and thus the eminent return of Christ to set up the Kingdom. They realized that something else was taking place, that explained the continued absence of Christ: Paul. And his message of the grace of God, the dispensation of the grace of God. THAT explained Christ’s absence, when, on the day of Pentecost, everything had been in place, according to the prophecy of Joel, and the kingdom was offered to Israel. Acts 15 marks the fading away of Israel and her prophecies, and the ramping up of the dispensation of grace. See Gal. Chapter 2. What was not clear at the beginning of Acts, the day of Pentecost, the stoning of Stephen, and the raising up of Paul, was made CLEAR at that council. And so the revelations from Christ to Paul continued, the body grew, Israel faded, until Acts 28 when she is blinded and set aside and officially becomes Lo Ammi, “not my people”. What Peter, James and John learned about the grace of God and the preaching of the cross, and the shed blood of Christ for the remission of sins they learned from Paul, Gal. Chapter 2.
Completely incomplete statement and inaccurate. In Galatians 2 Paul clearly chided the Judaizers for their influence in the Jerusalem church. It was clear these influences were trying to bring in elements of the ceremonial laws, which were clearly fulfilled by Christ Jesus. Paul later states in Galatians 5:9 that this was leaven, which means evil and which means Peter and the 11 were not practicing such but not ridding the Jerusalem church as they should. It has nothing to do with a new dispensation or separate practices by Jewish believers in Christ Jesus.
Peter did not need Paul to teach him about Grace, shed Blood of Jesus Christ and the cross! They were witnesses to it! Paul later in 1 Corinthians 15 even says they all preach the same Gospel.