In modern context, that might seem the way it worked, but I didn't think it makes sense when put in the culture and context of the time.
There were NO churches or places of fellowship for the new believer to learn and grow in. None. The only option was walking in the door of the local synagogue to the recoiluing stares at 'O.M.G. that unclean GOY.'. Acts 15 is a ruling saying, 'here are the basic things to get fixed first to enter fellowship, then learn Moses on Shabbat.'
We have trouble wrapping our Western mind around the magnitude of what was happening. The 'party of the circumcision' wanted FULL proselyte conversion to the rabbinic Judaism of the day, while Paul was battling against the tradition of the Pharisees and for keeping the written Torah of Moses.. it was a very fine line that makes him so hard to understand. The Acts 15 ruling perfectly filled that: New, non-Jewish, believers in Yeshua were to do a few basic things to be clean enough to come in the synagogue and learn Torah (and not oral traditions...).
We do similar today. Lead a hooker or addict to Yeshua, then lay a couple ground rules... likely a more modest appearance so she's not 'hanging out' in fellowship, leave profanity and harlotry behind, and no drugs. (General example.)
Just stopping in for a moment to do another flyby.
I get what you’re saying but have problems with the logic and reasoning behind it.
1) The idea that there were no churches (buildings) so there was no place to go to learn except the synagogue is a misleading and wrong statement to start with. The early church did not require churches to learn in because they met house to house for many decades after the day of Pentecost. They also met and taught other places like Solomons porch.
By the time Acts 15 rolls around, there are already plenty of “churches” to learn at like at Damascus, Jerusalem, Samaria, Antioch and a whole host of others in different cities that were already established throughout Asia Minor. Acts 14:23 All it takes is a brief look at chapters 10-14 and you will see churches everywhere where the scripture is being taught.
2) According to Acts 13:42 there doesn’t appear to be a standard of “cleanness” required to enter the Synagogue as Gentiles were apparently welcome anyway. Thus it makes no sense for the Christians to create more rules than the Synagogues so that Gentiles believers could go learn Torah in the Synagogues that openly accepted Gentiles anyway.
3) I agree with you that there was a definite rejection of the tradition of the Pharisees, which was primarily taught in the Synagogues. So according to your logic, the Apostles are adamantly rejecting these traditions but are gonna send new converts to the Pharisees in the Synagogues to learn Torah? I don’t think you thought that one out very well.
4)In Acts 21:21&25 there is a conversation that is referring to the Acts 15 decree for Gentiles. It begins by telling Paul that they’ve been informed about him that he has been teaching Jews among Gentiles to forsake Moses etc. Apparently this (to them in Jerusalem) is a no no. But as you can see in verse 25 the same prohibition does not apply to the Gentile believers by reference of the Acts 15 decree. So (to them) Jewish believers must follow Torah but Gentiles have “no such observation” commanded or even suggested. Rather their prohibitions are from things offered to idols, from blood, from things strangled and from fornication.
Acts 21:21And they are informed of thee, that thou teachest all the Jews which are among the Gentiles to forsake Moses, saying that they ought not to circumcise
their children, neither to walk after the customs.
Acts 21:25 As touching the Gentiles which believe, we have written
and concluded that they observe no such thing, save only that they keep themselves from
things offered to idols, and from blood, and from strangled, and from fornication.
So not only is your hypothesis not born out from the text from chapter 15, but it is directly refuted by chapter 21. (Also in 15 but who’s counting?)