For we do not wrestle against flesh and blood, but against the rulers, against the authorities, against the cosmic powers over this present darkness, against the spiritual forces of evil in the heavenly places.  – Ephesians 6:12
Throughout history and even in our world today, we see constant division.  We hear about wars, rumors of wars in all areas of the world.  We see families splitting up, division within the church, and everything in between.  We know this is a root of sin.  Without Christ, we are helpless and vulnerable to the bondage of sin.  Remember, that we are not truly at war with each other; at least we should not be. Instead, we are at war with the demonic realm, and Satan himself.  In Christ, we already have the victory.  Continue standing on the Word.  Continue to fight evil with the Word.  Remind him, he has already been defeated.