Anyone who listens primarily to Black Metal is very likely to be autistic and a total political sperg who is a member of at least one fed honeypot discord server. They're probably either a wignat, communist, an anarchist, or some super-autistic combination of two of those (like Nazbol). If you encounter a "Second wave" black metal (Gorgoroth, Burzum, Mayhem, etc) fan specifically, he's probably going to be middle-aged (or rapidly approaching it), a neopagan larper or deep into occult shit, and obsessed with an ethnic group he's not part of (since most are going to be an Amerimutt larping as a "pure Nordic Aryan viking").