While I am in no way Christian, nor do I have any religion (been an agnostic since middle school) I do not agree with that.
It may seem like a contradiction, but there are so many people out there, everyone has different tastes.
I am a really laid back guy, and if I saw myself walking down the streeet, I would never guess I listen to Dissection or Bloodbath (unless I was wearing a shirt, then I would just be a little confused). All I mean by that is, people say what they want to say in the style that suites them best.
Someone may have a strong religous background, but not care for the subtle singing and boring melodies and instead go for something with a bit more edge. If it works for them, then awesome. May not be my cup of tea, but all that means is I am not going to bother listening to it.
That being said, I am sorry this is so off-topic from the original reason for this thread.