According to Krister Stendahl, the main concern of Paul's writings on Jesus' role, and salvation by faith, is the problem of the inclusion of gentile (Greek) Torah observers into God's covenant. The inclusion of Gentiles into early Christianity posed a problem for the Jewish identity of the early Christians. Many of the Jewish Christians were fully faithful religious Jews, only differing in their acceptance of Jesus as the Messiah. Observance of the Jewish commands, including circumcision, was regarded as a token of the membership of this covenant, and the early Jewish Christians insisted on keeping those observances. The new converts did not follow all "Jewish Law" and refused to be circumcised, as circumcision was considered repulsive during the period of Hellenization of the Eastern Mediterranean.