Why Music Divides the Church - Confessions of a Former Worship Leader

How did music turn into something divisive, pivotal, and central in the worship of the modern church?  Dan Lucarini is a former CCM Worship Leader, and he wrote a book called "Why I left the Modern Contemporary Christian Music Movement." Does Rock belong in the worship service? Does this form best convey reverence and fear of God in His worship? Or does this form focus on feelings, self, and personal experience? This comes from best-of-collection for the Generations broadcast.