Adam Clarke on Romans 3:1

Jew. What advantage then hath the Jew? Or what profit is there of circumcision? - As if he had said: You lately allowed, (Rom 2:25), that circumcision verily profited; but if circumcision, or our being in covenant with God, raises us no higher in the Divine favor than the Gentiles; if the virtuous among them are as acceptable as any of us; nay, and condemn our nation too, as no longer deserving the Divine regards; pray tell me, wherein lies the superior honor of the Jew; and what benefit can arise to him from his circumcision, and being vested in the privileges of God's peculiar people?