I have no problem with Christian Metal, even though I wont listen to it. I remember back in college there is this girl in my Christian fellowship. She's black and she dressed gothic but she's full of bible and can preach it too.
Listening to this Christian Metal, I don't even know what they are screaming.. its sound like someone whose demons were about to come out of his body.. Blood of Jesus..
But its almost similar to when pentecostals and praying, yelling and stomping their feet on the floor

Even some preachers scream and yell when they get to the peek..

But back to songs that doesn't make sense..

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LIFE IS WORSHIP
WORSHIP EXPERIENCE IS NOT ABOUT HOW YOU FEEL, BUT HOW WHOM YOU WORSHIP FEELS ABOUT YOU.
GOD CREATE IN ME A HEART TO FEAR SIN AND EVERY UNHOLY THINGS, SO I MAY LIVE RIGHTEOUSLY FOR YOU.