Not that I take Jack Black seriously, but that was over the top to have everyone hold hands in a satanic prayer. Yeah, he was making fun of the stereotype that he himself was playing - that’s his style. It’s still disturbing, and it’s dangerous to think that such humorously-intended acts are without real consequence.
I wouldn’t equate rock music with satanism, though there’s a strong tie among some. Truthfully I only know of one person who was led into satanism (technically LaVeyism) by rock, and that was by Marilyn Manson. I personally love Sevendust, who are fairly heavy-sounding but often surprisingly spiritual.
If I’d place satanism’s influence anywhere, it’d be in business. Why do businesspeople, who are making lots of money anyway, decide to break the rules and make even more money doing something entirely unethical or otherwise illegal? Ken Lay and the guys at Enron would’ve made much more money had they not resorted to creative accounting. Yeah, it would’ve taken longer, but it’s an irrational choice to do something that will eventually get you caught. The only explanation is demonic influence - it clouds judgment with something irrational, ie the love of money.
I’d also place it in politics. Just recently we learned in Missouri that our lovely Legislature is spending money on themselves like hotcakes, and have been shaking down lobbyists for donations. They’d say they wanted a retirement party for a staffer, send out an email to lobbyists, and basically ask “Who wants to pay for this?” That’s evil, the use of power to claim what is not justly yours.