Ok, but if this is racist’s about skin color I would def say that northern ppl are children of darkness and equator-ish ppl children of light.

Also Europes north is full of metal bands, so that tracks too.

And there was at least one metal band called that:

However, if I didn’t have the racist context, I would def think its nocturnal people (which I guess includes vampires, but they are a minority).