When you tear down other Christians just because of how they look, what music they listen to, or what devout prayers they love, you do the devil's work. There is nothing godly in tearing down a fellow brother or sister in the faith for superficial reasons...we shouldn't be tearing down anyone at all. We should be lifting each other in prayer, bearing each other's burdens in love, and instructing each other gently in faith. To do less is to forego the will of Christ in how we should act towards one another, and do the enemy's bidding.