.. kebs, learn more about music and it's vast expression. It's hard talking to you coz you can't relate, you're not a die-hard musician. What instrument do you play ?? Have you composed your own music ?? Music has been with me since I was very little, let's just say, music is my life, all the facets of music. I don't merely listen to music, i understand it. Music is my religion so to speak. From high school to college I had a band, a heavy metal band, we covered songs and made our own music. Sadly, after i graduated from college, my music life has been on the listening-side only coz my band mates are busy with their private lives too.
.. your examples are from research not from your own experience nor volition. Have you ever composed a heavy metal song ?? Have you ever felt that euphoria when you're " in the zone " in your playing

If the answer is NO. then, thou shalt not answer nor push that heavy metal is associated with satanism.