God’s wrath due to the lack of thanks and honour to him as Creator, extends to all people impartially (Romans 2:11). That is why it is good that the gospel is a saving power for the Jew and the Greek (Romans 1:16), for God’s impartial wrath affects the Jew first and also the Greek
(Romans 2:9b, Romans 2:10b). Romans 2:1–16 expands on this. It does raise the question whether the Jews have certain privileges in this regard, in consequence of which they might claim a unique status. Paul discusses this question in Romans 2:17–29. Undoubtedly, this would have made a strange impression on the Christians in Rome. As Gentile Christians they looked up to the old people of the one God, from which the King of peace had come. That is why, later on in Romans 3:1–31, Paul will elaborate on what he discussed in Romans 2:1–29. Having gained their attention in Romans 2:1–29 with his statement that Jews need deliverance as much as Greeks, he now wants to apprise readers who had been shocked by that statement.1
1 Therefore you have no excuse, O man, every one of you who judges. For in passing judgment on another you condemn yourself, because you, the judge, practice the very same things.