I am a Christian and member of the Church of Jesus Christ of Latter-day Saints.
I love good, uplifting music, the kind that Casting Crowns play. I learned about Mark Hall and Castings Crowns from the movies Courageous and Facing the Giants. But the most powerful emotions that I have felt are associated with Mark's testimony, part 2.
In the LDS faith we believe the song of the heart is a prayer unto God. The power of music, video and the written word in the hands of God is beyond comprehension. The Holy Ghost testifies of the truth, always, where ever and when ever a child of God is willing to listen. Music that uplifts and inspires is so helpful to the soul that just wants to find happiness in life and is willing to develop their relationship with Jesus Christ through faith in him and a believing heart that he is the light of the world.
So, I say to Mark Hall and the members of Casting Crowns, keep up the work you are doing. You have no idea how many lives your are impacting for the better. And yes, many a Christian brother and sister of the Mormon church are both fans and supporters in the cause of Christ.