For you were called to freedom, brothers. Only do not use your freedom as an opportunity for the flesh, but through love serve one another. For the whole law is fulfilled in one word: “You shall love your neighbor as yourself.” But if you bite and devour one another, watch out that you are not consumed by one another. But I say, walk by the Spirit, and you will not gratify the desires of the flesh.
Galatians 5:13-16
False teachers are so problematic because they affect so many people. This is why Paul is so intense in this letter. The Galatians were not running in the truth. They were listening to the message of bondage. Paul confronts false teachers and their messages as he warns the Galatians back to the freedom of the Gospel.