Classic set up of the Straw Man argument against Christian rock. He who frames the question wins the debate. I've seen these types since the 80s when they slammed Stryper, Petra, Rez Band, etc. They dismiss the Fruit. Style over substance. They have no facts that CCM destroys lives, churches or sends one to hell. Religious legalism.
"I know and am convinced in the Lord Jesus, that nothing is unclean in itself; but to him who thinks anything is unclean, to him it is unclean." Romans
14:14
Especially considering the realm of strictly Christian music. Stop judging the genre's. The genre is't going to ruin anything. The lyrics are the important part, regardless of whether they are sung, screamed, or hummed. Anyone saying Christian Rock is bad for you, that person is in reality is actually what is bad for you.
Also my pastor preaches straight from the bible every week. He just isn't a legalist. Nor does he support those who are.