There's a thread dealing with that same topic, but it's a tad cluttered and not how I imagined it would turn out.
I remember reading an interview with Hansi Kursch (vocalist of BG) and he said he believes in God, but he doesn't condone some of the actions the Church/religion does. I'd say he's a run of the mill guy with a place for God and morality in his heart, but he believes organised religion is more preach than practice. Honestly...if you're not bothered with Dragonforce's lyrics (assuming from your picture) you really shouldn't be bothered with Blind Guardian. If anything Dragonforce's life style speaks of sin, just look at their days as Demoniac for instance.
In truth, neither Dragonforce nor Blind Guardian are bands you should fear if you're worried about damnation. Their lyrics are mostly fluff with a positive message somewhere in the background. If you were to get to know the band you'd probably learn they're just regular guys with normal lives.
Just my two cents.