Noted scholar Elaine Pagels points out the tension between the teachings of Paul and the teachings of James and the Twelve:
Paul’s impassioned preaching soon attracted a considerable following of Gentiles in the Syrian city of Antioch, but it also embroiled him in bitter disputes with other followers of Jesus. People who belonged to the Jerusalem group led by Jesus’ brother James apparently charged that Paul’s “gospel” was so radical that it contradicted what they had heard from the most respected leaders, including James himself and the disciples Peter and John. Although what Luke later wrote in the Book of Acts glossed over these disputes, Paul’s own words suggest that initially he was concerned that Peter and James—or, at any rate, their followers—might oppose him for preaching to Gentiles a “gospel” that had dropped all Torah requirements, although he says that finally they agreed to let him teach it.
So when other leaders in the movement accused Paul of having no credentials to speak for Jesus, whom he had never met, Paul burst out in anger. He sarcastically called his accusers “super apostles” who were forcing him to talk about matters that made him feel foolish and uncomfortable, since what he had to say would sound like boasting. Paul insisted that he taught only what came to him directly “through revelation”—not from Peter, James, or anyone else on earth. Paul insisted that his authority came straight from God—from “visions and revelations of the Lord.”
Pagels, Elaine. Revelations: Visions, Prophecy, and Politics in the Book of Revelation (p. 44). Penguin Publishing Group. Kindle Edition.
When John accuses “evildoers” of leading gullible people into sin, what troubles him is what troubled the Essenes: whether—or how much—to accommodate pagan culture. And when we see Jesus’ earliest followers, including Peter, James, and Paul, not as we usually see them, as early Christians, but as they saw themselves—as Jews who had found God’s messiah—we can see that they struggled with the same question. For when John charges that certain prophets and teachers are encouraging God’s people to eat “unclean” food and engage in “unclean” sex, he is taking up arguments that had broken out between Paul and followers of James and Peter about forty years earlier—an argument that John of Patmos continues with a second generation of Paul’s followers.57 For when we ask, who are the “evildoers” against whom John warns? we may be surprised at the answer. Those whom John says Jesus “hates” look very much like Gentile followers of Jesus converted through Paul’s teaching. Many commentators have pointed out that when we step back from John’s angry rhetoric, we can see that the very practices John denounces are those that Paul had recommended.
Pagels, Elaine. Revelations: Visions, Prophecy, and Politics in the Book of Revelation (pp. 53-54). Penguin Publishing Group. Kindle Edition.