you could just believe in a god/gods however you want to perceive them. whatever the lutheran rules on swearing, wanking and metal are (i haven't looked into them myself) you can bet they were written by someone abusing his position of church authority to try and rid the world of stuff he didn't like, "in the name of the lord"

and i'm not slagging off religion as a concept here before anyone starts, just the idea that following some arbitrary rules written by some guy a thousand years ago to comply with the social norms of the time would get you on god's good side.