Here, we walk through the next chunk of St. Paul (1:18-3:20). Both gentiles and Jews are equally accountable for their lack of covenantal fidelity, gentiles in accord with the revelation of God's presence and decrees as observable in nature, Jews in accordance with the Law received by Moses. In the face of God's righteousness (covenantal fidelity), our infidelity is not negligible. God help us! And indeed He does. We'll get into that in #3.
