I forgot to post this:
When my friend came out of the show he was presented with a small magazine about ACDC. It turned out that it was printed by bible bashers. I was really suprised I thought they died out until today. I partly read the thing and I have to admit they are a lot better in their arguments than they've been in the eightees. They started with the band story and ended up telling the story of fans who turned to Jesus now.