What's wrong with fancying 'evil' and 'devilish' music? If I ever became a musician, I'm sure I'd do something like that at some point in my career. Why? Because it's in my taste. I like dark, macabre stuff in every thing. Problem?
Music very often makes references to things happening around in the world at a given time. The world is being driven insane by these Illuminati/Freemasons etc conspiracy theories. So what if they mention it in their songs? Aren't these theories the fad nowadays?
The most plausible purpose of these theories, in my opinion, is not to expose conspiracies. Rather, they seem to me conspiracies themselves. Conspiracy to strengthen the hate in Muslims for the West and sowing more seeds of prejudice in them. Prejudice will replace reason.
While the world progresses and develops, we remain stunned with paranoia of an almighty secret society.
Dark Ages never did end. In fact, they've only just begun.