Something about an outwardly Christian individual listening to Cannibal Corpse and Dying Fetus leaves me a little...well... .
Most of my extended family is Christian. Not just your church going types, but your real hardcore, home schooling, Missionaries in foreign countries, not have sex until were married types. I can say without a shadow of a doubt, they have never listened to songs named Coffinfeeder or Homicidal Retribution.
I know you're scratching your head over this one.
I grew up listening to metal - but not all of it. (Some of it left much to be desired IMO, i.e. Motley Crue, Poison, Bon Jovi.) It's one of those things that I cannot get rid of. At the same time, I don't think it will send me to hell (just like I think that Christians who can't quit smoking don't go to hell either, but that's getting off topic) - even though there are some out there who would vehemently disagree with me.
In context, though, what I said is that I listen to that kind of stuff when I play World of Warcraft.