I agree that the words are the most important part of the message. But I think the music itself is spiritual and conveys message that communicates on a different level.
The music I tend to write is very dark, but I use the darkness to represent how it would be if one had to face an eternity without feeling God's love. IS that wrong? If so, why?
I guess if you want to scare people to Christ that is fine. And it might work with some people. And there is nothing wrong with that.
But I think the more important message of the Gospel is one of light and hope. That Christ came into this world as a light to mankind, and that to know Him removes the burden of darkness from our lives. That He lifts us up and frees us.
Ah - here we are, with what my husband (a mature Christian with a doctorate in music) laughingly refers to as The Demon Backbeat. I had hoped people were past that notion, but it's obviously alive and well.
I wouldn't phrase it as "scaring people to Christ..." so much as a message of Light and Hope by showing the contrast - life with Christ versus "life" without...