Since all men are sinners, they cannot judge one another, but the judgment of God is true. Can a man escape who does the same things as the one he judges? Can we despise God's goodness and long-suffering when we know that it brings man to repentance?
Those who have Christ are patient in well doing, having eternal life. The contentious will receive indignation and wrath, Jew or Gentile, for God is no respecter of persons. There will be a day when God will judge the secrets of men by Paul's gospel.
The Jew lost his standing before God by breaking the law. True circumcision is not outward but inward; it is "of the heart in the spirit, and not in the letter" and receives praise from God, not from men. God must have reality. Would one lead an unreal life knowing it ends in judgment? God's name was blasphemed among the Gentiles because of the pharisaical Jew.