Much of the discourse surrounding San Francisco’s Deafheaven has concerned how metal or otherwise they are. Though their sound is rooted in the death-obsessed subgenre of black metal, it touches on post-rock, hardcore and shoegaze, while band members George Clarke and Kerry McCoy opt for button-down shirts and side-partings over corpsepaint, leather and steel. As Clarke told The Fader recently, ““If you ever see me with a spiked jacket on, I just look like a douchebag.” They get tagged as hipsters by black metal purists, and mocked for their non-adherence to tradition. And, fortunately, they don’t appear to care a…