In this verse, Paul is addressing a group of individuals who were advocating for circumcision as a requirement for salvation, thereby disrupting the peace and unity of the Galatian church. His use of hyperbolic language reflects his deep frustration and the gravity of the situation. Paul is not advocating harm but is using strong rhetoric to make a point about the futility and absurdity of their insistence on circumcision.
The broader context of Paul's letter to the Galatians is a defense of the Gospel of grace. He argues that faith in Jesus Christ, not adherence to the Jewish law, is what brings salvation. By using such strong language, Paul is emphasizing the importance of focusing on the transformative power of faith and the freedom it brings, rather than getting caught up in legalistic practices. This verse serves as a powerful reminder of the need to prioritize inner spiritual growth and the essence of the Gospel over external rituals and regulations.