Read: Acts 15:1-21
Certain people came down from Judea to Antioch and were teaching the believers: Unless you are circumcised, according to the custom taught by Moses, you cannot be saved. Acts 15:1
In the fifteenth chapter of Acts is the story of a betrayal of the gospel. Here we learn of the clear emergence of what we can only call false Christianity. You will never understand Christianity until you understand that there are always present, in any so-called Christian gathering, manifestations and representatives of both true and false Christianity. Unfortunately, false Christianity is believed by millions who think they have understood the true, and have rejected the false. Therefore their minds are closed to the truth when it comes. Here we see the first emergence of that kind of false Christianity which is unthinkingly accepted by millions of people today.
It all began with the introduction of a very plausible and attractive heresy which came disguised as Christianity. Luke says that certain Jewish brethren, who ostensibly were Christians, came down from Jerusalem to Antioch. They came among the Gentile believers there, who had just come out of raw paganism, who had been idolaters, had been devotees of the licentious and sexually immoral practices of the pagan temples. These Gentiles had been hopeless in their outlook toward the future beyond this life and were sunken in despair and darkness, but then God had saved them. They were now rejoicing in Christ.