Not of works, lest any man should boast.
Romans 3:27 (KJV)
Where is boasting then? It is excluded. By what law? of works? Nay: but by the law of faith.
To follow the line of doctrine of Romans three we learn that,
The Jews do have an advantage over the Gentiles, specifically that the Word of God came to them first.
This advantage, however, does not make them better than the Gentiles.