text: The identity of these "opponents" is disputed. However, the majority of modern scholars view them as Jewish Christians, who taught that in order for converts to belong to the People of God, they must be subject to some or all of the Jewish Law (i.e. Judaizers). The letter indicates controversy concerning circumcision, Sabbath observance, and the Mosaic Covenant. It would appear, from Paul's response, that they cited the example of Abraham, who was circumcised as a mark of receiving the covenant blessings. They certainly appear to have questioned Paul's authority as an apostle, perhaps appealing to the greater authority of the Jerusalem church governed by James (brother of Jesus).
  North Galatian view
  The North Galatian view holds that the epistle was written very soon after Paul's second visit to Galatia. In this view, the visit to Jerusalem, mentioned in Galatians 2:1–10, is identical with that of Acts 15, which is spoken of as a thing of the past. Consequently, the epistle seems to have been written after the Council of Jerusalem.  The similarity between this epistle and the epistle to the Romans has led to the conclusion that they were both written at roughly the same time, during Paul's stay in Macedonia in roughly 56–57.