Galatians 6:12

To make a fair shew in the flesh. — To obtain a reputation for religiousness in externals, like the hypocrites, who “love to pray standing in the synagogues and in the corners of the streets, that they may be seen of men” (Matthew 6:5). The object of the Judaisers was by this means to keep in with their countrymen, the Jews, and even to gain favour amongst them by seeming to win over proselytes to the Mosaic law.

Only lest they should suffer persecution for the cross of Christ. — What aroused the antagonism of the Jews against the Christians was evidently not so much the confession of the Messiahship of Jesus as the declared abolition of the Law of Moses. By suppressing this side of Christian teaching, the Judaisers could easily obtain toleration for their other tenets. If, on the other hand, they were to emphasise it, the full weight of persecution would fall upon them — its ostensible ground being the doctrine of a crucified Messiah. Accordingly, they persuaded as many of the Galatians as they could to accept circumcision, and made the most of this propagandist zeal to their Jewish neighbours.