Galatians 6:12 - Matthew Poole's English Annotations on the Holy Bible

The apostle here reflecteth upon those false teachers who had perverted this church, and discovereth their hypocrisy under all their pretences of good will to them. These are those who (he saith) desired to make a fair show in the flesh; that is, to make a fair show to the world, as men very devout, which formalists and persons over zealous for rituals ordinarily do. These would constrain, were very urgent to persuade, these believers to be circumcised; not out of any love they had to the law of God, or to the souls of these Galatians, but only to avoid persecution; for as the Jews were more favourable to such Christians, who, together with the doctrine of Christ, observed also their rites and legal ceremonies; so we are told by so of the ancients, that some of the Roman emperors, by their edicts, gave liberty to the Jews, in the provinces subject to them, to use their own religious rites: now all who were circumcised went under that notion, so had more liberty than those who were not circumcised, who were persecuted both by the Jewish and the heathen magistrates. The apostle saith, that these false teachers, who so zealously urged circumcision upon this Gentile church, did it for the avoiding the danger of persecution; which they saw would follow their standing fast in their gospel liberty, and not bringing themselves under the law: which persecution, he tacitly hinteth, ought not to be so industriously shunned and avoided, because it was for Christ's sake, who had endured the cross for them.