Paul’s augmented rebuke of Peter says: if you’re going to live by the law at all, you have to live by it in total. But to do so would be pointless, since even we Jews know that we are not justified before God by that law, but by faith, specifically the faith of Jesus. So there is no place, the implied argument goes, for tiers within Christ’s followers based on adherence to Jewish customs.
Galatians 2:3-10 (3) But not even Titus, who was with me, though he was a Greek, was not compelled to be circumcised (4) because of false brothers smuggled in (who slipped in to spy out our freedom which we have in Christ Jesus in order to enslave us), (5) to whom we did not yield…
If we want to be plain spoken and unconcerned with pleasing men in the Pauline sense, what that means for us is that we should be bold in proclaiming the good news that Jesus has died for our sins and has been raised from the dead for our salvation.