What is the meaning of Acts 15:1?

* The two F.O.G. Bibles & Commentary below are currently a work in progress.

Then some men came down from Judea and were teaching the brothers, “Unless you are circumcised according to the custom of Moses, you cannot be saved.”

Berean Standard Bible (BSB)

Some men came down from Judea and taught the brothers, “Unless you are circumcised after the custom of Moses, you can’t be saved.”

World English Bible (WEB)

And{G2532} certain men{G5100} which came down{G2718}{(G5631)} from{G575} Judaea{G2449} taught{G1321}{(G5707)} the brethren{G80}, and said,{G3754} Except{G3362} ye be circumcised{G4059}{(G5747)} after the manner{G1485} of Moses{G3475}, ye cannot{G3756}{G1410}{(G5736)} be saved{G4982}{(G5683)}.

Strong's King James

(1) Some came down from Judea teaching the brothers that, "Unless you're circumcised to the custom of Moshe (Drawn from Water), you can't be saved."

The F.O.G*

[1] The joy of the growing church was suddenly challenged when certain men came from Judea to Antioch, insisting to the Gentile believers: "Unless you undergo circumcision according to Mosaic tradition, you cannot be saved." Their words fell like stones into peaceful waters, creating ripples of doubt and confusion.

The F.O.G Paraphrase

And certain having come down from Judea, were teaching the brethren—‘If ye be not circumcised after the custom of Moses, ye are not able to be saved;’

Young's Literal Translation