The Apostle Paul
Galatians 2:4BSB·traditional attribution

This issue arose because some false brothers had come in under false pretenses to spy on our freedom in Christ Jesus, in order to enslave us.

John Calvin Reformed @genevareformer

4. And that because of false brethren. This may mean either that false brethren made it the subject of wicked accusation, and endeavored to compel him; or that Paul purposely did not circumcise him, because he saw that they would immediately make it an occasion of slander. They had insinuated themselves into Paul’s company with the hope of gaining one of two objects.

Matthew Henry Presbyterian @wholebiblehenry

It should seem, by the account Paul gives of himself in this chapter, that, from the very first preaching and planting of Christianity, there was a difference of apprehension between those Christians who had first been Jews and those who had first been Gentiles.

Commenting on Galatians 2:1-10

John Gill Reformed Baptist @doctorgill

And that because of false brethren,.... This is the reason why the elders did not insist upon the circumcision of Titus, why he did not submit to it, and why the apostle would not admit of it: had it been left as a thing indifferent, or had it been moved for in order to satisfy some weak minds, it might have been complied with, as...