12. they … which trouble you—Translate, as the Greek is different from Ga 5:10, "they who are unsettling you."
were even cut off—even as they desire your foreskin to be cut off and cast away by circumcision, so would that they were even cut off from your communion, being worthless as a castaway foreskin (Ga 1:7, 8; compare Php 3:2). The fathers, Jerome, Ambrose, Augustine, and Chrysostom, explain it, "Would that they would even cut themselves off," that is, cut off not merely the foreskin, but the whole member: if circumcision be not enough for them, then let them have excision also; an outburst hardly suitable to the gravity of an apostle. But Ga 5:9, 10 plainly point to excommunication as the judgment threatened against the troublers: and danger of the bad "leaven" spreading, as the reason for it.