As I just said in a recent post, “Romans in not simply a theological book that Paul sought to write” but there were sociological reasons, perhaps political reasons. As we try to be aware of weather or not we are reading into Romans our perception of Paul’s theology we find that the book clearly addresses many things in the life of the church in Rome.
But I mean to highlight that Paul specifically in the beginning and ending of his book he speaks of 1) wanting to visit Rome, but 2) returning to Jerusalem from Macedonia region (likely Corinth) first, 3) finishing his work from Jerusalem to Illyricum and not wanting to build on others foundations, 4) wanting to finally come to Rome and get the churches help for further expansion west to Spain.
In other words one of Paul’s primary concerns outside of this specific group of believers in Rome is that he wants to see the ongoing mission of the church. He believes that since Jesus is in fact the Messiah then now is the time when Gods purposes for Israel are being realized when Gentiles believe and worship the God of Israel now revealed in the Messiah.
That said, if the church in Rome wants to be a part of this ongoing mission. Then they, a mixed group of Jews and Gentiles need to learn to get along. Paul speaks plainly in chapter 14 about not despising each other over issues of food and drink, or holy days. But before that Paul goes much deeper in chapters 1-11 as to what exactly they are to find their common ground in. Paul is careful not to shift the balance to far to one side which would lead towards anti-Semitic attitudes, or to attitudes of Jewish superiority.
This becomes more clear with just a simple knowledge of the timeline and historical events of the time. Paul is writing this letter in his third missionary journey 53-57 AD. He is near the end of it. At 54 AD Emperor Caligula died and his edict to ban Jews from Rome ended. The church that had once been Jewish and Gentile had become purely Gentile for a number of years, then the Jews came back. Not difficult then to image hostility towards the Jews from Gentile believers who do not feel the need to observe Jewish holidays and Jewish diet. The returned Jews may be causing some confusion. They may be narrowing the grace of God to yes embracing Jesus as Messiah but also doing the rest of the requirements in order to really be part of the Family of God. Gentiles are not only resisting this but perhaps getting into arguments and judgements directed towards those who historically rejected Jesus and depend on their traditions to much. They need some intervention and conflict resolution. Paul goes to the deepest possibly roots of this conflict. It is no wonder that this book has primarily been used to answer questions of how people get reconciled with God. Since there is a major emphasis on unity it is easy to narrow the discussion to unity between man and God. Really the roots of the problem presented here for the church in Rome goes then to the question of mans unity with God irrespective of their racial ethnicity. So it is not that Paul never talks about reconciliation with God but i would say the primary purposes of Paul in the letter and therefore the emphasis is on getting the church unified by the Faithfulness of God to his covenants.