In chapter2Paul showed that God"s judgment of all people rests on character rather than ceremony. He put the Jew on the same level as the Gentile regarding their standing before God. Still God Himself made a distinction between Jews and Gentiles. In Romans 3:1-8, Paul dealt with that distinction. He did this so there would be no question in the minds of his Jewish audience that they were guilty before God and needed to trust in Jesus Christ. The passage affirms the continuing faithfulness of God to His covenant people but clarifies that His faithfulness in no way precludes His judging sinful Jews. [source][source][source]
"In thus allowing the Roman Christians to "listen in" on this dialogue, Paul warns his mainly Gentile audience that they should not interpret the leveling of distinctions between Jew and Gentile in terms of God"s judgment and salvation as the canceling of all the privileges of Israel." [1][source]