It simply means that certain individuals are unsettling you; they want to distort the gospel of Christ.

they merely heard that 'our former persecutor is now preaching the faith he once harried,'

There were traitors of false brothers, who had crept in to spy out the freedom we enjoy in Christ Jesus; they did aim at enslaving us again.

On the contrary, when they saw I had been entrusted with the gospel for the benefit of the uncircumcised, just as Peter had been for the circumcised

and when they recognized the grace I had been given, then the so-called 'pillars' of the church, James and Cephas and John, gave myself and Barnabas the right hand of fellowship. Our sphere was to be the Gentiles, theirs the circumcised.

Before certain emissaries of James arrived, he ate along with the Gentile Christians; but when they arrived, he began to draw back and hold aloof, because he was afraid of the circumcision party.

But I saw they were swerving from the true line of the gospel; so I said to Cephas in presence of them all, "If you live like the Gentiles and not like the Jews, though you are a Jew yourself, why do you oblige the Gentiles to become Jews?" ??15 We may be Jews by birth and not 'Gentile sinners,'

These men make much of you ??yes, but for dishonest ends; they want to debar you from us, so that you may make much of them.

Why, even the circumcision party do not observe the Law themselves! They merely want you to get circumcised, so as to boast over your flesh!