When you think about it however black metal and death metal are just like Black Sabbath, except it has kept developing along the line of thought that it started. They wanted to sound like horror movie soundtracks... that got expanded to a question of what is horror, and the answer is apparently a Nietzschean naturalism. So from here we have to find a way to make horror even more appealing, to raise the next generation of people who murder idiots and praise battle, who aren't afraid of the rules of the Church even if they don't say "Made in Jerusalem|The Vatican" upon them...