In Galatia, Paul had begun his ministry to the Gentiles, and had established his doctrine of salvation by faith without works of the Law. AT A GLANCE The Chruches of Galatia2 Yet other teachers had followed Paul. These teachers, known as Judaizers, taught that Gentiles had to be circumcised and turn to the Law as well as accepting Jesus as their Savior. In addition, they attacked Paul in two particular ways: 1) they claimed that his apostleship was either inauthentic or secondary to that of the