Sam is forgetting that there were other apostles who disagreed with Paul regarding major issues of doctrine...
6I am astonished that you are so quickly deserting the one who called you by the grace of Christ and are turning to a different gospel
1You foolish Galatians! Who has bewitched you? Before your very eyes Jesus Christ was clearly portrayed as crucified. 2I would like to learn just one thing from you: Did you receive the Spirit by observing the law, or by believing what you heard? 3Are you so foolish?
2 Corinthians 11:4-5
4For if someone comes to you and preaches a Jesus other than the Jesus we preached, or if you receive a different spirit from the one you received, or a different gospel from the one you accepted, you put up with it easily enough. 5But I do not think I am in the least inferior to those "super-apostles."
2 Corinthians 11: 22-24
What anyone else dares to boast about—I am speaking as a fool—I also dare to boast about. 22Are they Hebrews? So am I. Are they Israelites? So am I. Are they Abraham's descendants? So am I. 23Are they servants of Christ? (I am out of my mind to talk like this.) I am more. I have worked much harder, been in prison more frequently, been flogged more severely, and been exposed to death again and again. 24Five times I received from the Jews the forty lashes minus one.
Lets also not forget the incident of Paul opposing Peter at Antioch...
Paul Opposes Peter
11When Peter came to Antioch, I opposed him to his face, because he was clearly in the wrong. 12Before certain men came from James, he used to eat with the Gentiles. But when they arrived, he began to draw back and separate himself from the Gentiles because he was afraid of those who belonged to the circumcision group. (why did people such as the Apostle James still believe that the law regarding food should still be applied? If Jesus came to replace the law, then why are they still following the law?) 13The other Jews joined him in his hypocrisy, so that by their hypocrisy even Barnabas was led astray. (so, Peter, James and Barnabas are wrong?)
14When I saw that they were not acting in line with the truth of the gospel, I said to Peter in front of them all, "You are a Jew, yet you live like a Gentile and not like a Jew. How is it, then, that you force Gentiles to follow Jewish customs?
15"We who are Jews by birth and not 'Gentile sinners' 16know that a man is not justified by observing the law, but by faith in Jesus Christ. So we, too, have put our faith in Christ Jesus that we may be justified by faith in Christ and not by observing the law, because by observing the law no one will be justified. (why are they arguing over following the law or not? Why are they not in agreement of doctrine?)
17"If, while we seek to be justified in Christ, it becomes evident that we ourselves are sinners, does that mean that Christ promotes sin? Absolutely not! 18If I rebuild what I destroyed, I prove that I am a lawbreaker. 19For through the law I died to the law so that I might live for God. 20I have been crucified with Christ and I no longer live, but Christ lives in me. The life I live in the body, I live by faith in the Son of God, who loved me and gave himself for me. 21I do not set aside the grace of God, for if righteousness could be gained through the law, Christ died for nothing!"[d]
Paul condemns all Jewish Christians including Peter and Barnabas. We only have Paul’s side of the story but Peter’s recollection of this story is not given to us in the New Testament.
Peter truly would have known Jesus better than Paul. There is dispute whether 1 Peter is a letter written by Peter and almost all scholars, ancient and modern agree that 2 Peter is not a letter written by Peter. Sam may argue and quote his scholars to prove that 2 Peter is written by Peter, however there are still many major Christian scholars who don't think that 2 Peter was written by Peter so at the end of the day we are not going to be 100% sure and therefore cannot use 2 Peter as evidence to prove that he agreed with Paul.
31After they prayed, the place where they were meeting was shaken. And they were all filled with the Holy Spirit and spoke the word of God boldly.
If Peter was filled with the Holy Spirit then why is Paul calling Peter a hypocrite for eating with the Gentiles and then when people came from James he got up. James is Jesus’ half brother, he lived and stayed with Jesus. Why did he still think that people have to eat kosher meat? We don’t have any account of Peter’s story regarding this incident. Barnabas is also called a hypocrite in verse 13. Look how in verses 15 thought 17 Paul is arguing with them about the law. That means the disciples wanted to follow the law and suggested following it. Otherwise Paul wouldn’t have mentioned it. How could he say those things to Peter and look what Jesus said about Peter