are there any fundamentalist christian rock bands?
Answer I am going to assume you mean bands that are blatently Christian and have songs that can only be interpretted as such. There are a few hardcore bands that are like that, but I am not much of an expert in the rock scene. I wish I could offer a better answer than that, but my Christian music expertise is strictly in the hardcore/heavy metal music. Thatnks for the question, though.
