Being worried that someone calls you out for misidentifying a metal subgenre is a metal fan staple. In any case Moonsorrow is definitely at least BM adjacent and a lot of black metal musicians are pagan for… varyingly good reasons.

Did check if first if it doesn’t shout something vile however

Hmm dunno, "The ice blinds your eyes as far as the eye can see, the wind furiously slashes through hands, the mountains surround their prey…" Sounds pretty violent 😉