Thematic Bible: Whose circumcision is made uncircumcision

Now circumcision benefits you only if you practice the law, but if you break the law, your circumcision is no better than uncircumcision. So if the uncircumcised heathen man observes the just demands of the law, will he not be counted as though he were a Jew? And shall not the heathen man who is physically uncircumcised, and yet observes the law, condemn you who have the letter of the law and are physically circumcised, and yet break the law?