How do we know the doctrine of division is true?

In Luke 12:51-53, Jesus explicitly teaches that He did not come to bring peace on earth but rather division. This division arises from the varying responses individuals have towards His message. Believers will often experience conflict and division, even within their own families, due to differing beliefs regarding Christ. The consistent pattern throughout scripture shows that the proclamation of the Gospel elicits strong reactions, demonstrating that Jesus' presence draws a line between believers and non-believers.