Ok, for one, my understanding of dogma is that it is a man made law in an organized religion, which is found no where in the text of that religion (i.e. don't eat meat on Fridays during Lent). I also thought this was exclusive to Catholicism. Calling an entire religion such as Buddism dogma, would be improper usage of the term.
Rock and roll is not devil's music. I question peoples' motivation when such extreme myopic statements are made.
There are many "Christian rock" bands out there, as well as "Christian metal" bands out there. The latter sounds much like the darker version....essentially, they are speaking of the same topic, just rooting for different sides.