Ok, I can vibe somewhat with this. As far as pop music in this regard, I've always been fond of this Robert Crumb screed on Modern Popular Music. And black metal writ large isn't dangerous, though there are certainly those that are believers or too subversive where I simply care less about them.The pop song about the "cool kids" is more dangerous as it is more subtle in its "message" and injects into your subconscious the idea that some are "worth more than others" which is an outright fascism.
Black metal can be an outright cartoonish and goofy about its fascination with war, Nazis etc. and therefore it is less dangerous and mostly can be used as a smoke and mirrors to cover up the real fascism of the "cool kids". It is this counter-intuitive nature of politics that people usually struggle with and therefore get easily manipulated by the likes of Trotsky.
It is the same as beer is more dangerous than Jack Daniels.
Trotsky, I don't have an opinion of him other than a few good essays I've read. Don't think it pertains at all to the US today, though.