The intruders in Galatia were most likely a group of Jewish believers that came from Judea (Acts 15:1). Quite possibly they previously belonged to the part of the Pharisees. They clearly had great respect for the Old Testament and the laws which God gave to Moses. They emphasized the fact that Jesus did not come to abolish the law (Matthew 5:17–18).1
7 not that there is another one, but there are some who trouble you and want to distort the gospel of Christ.