Let’s hear it for the unruly punk youth of Copenhagen. The Danish hardcore kids in Iceage make an emotionally intense racket, with that rare mix of aggression and delicacy. Even on their raw 2011 debut, Iceage knew how to sculpt the noise into songs, but You’re Nothing is a huge jump forward. Although the lyrics are mostly in English, singer-guitarist Elias Rønnenfelt growls them as guttural cries of pain, especially in the high-velocity heartbreak of “Burning Hand” and “Ecstasy.” “Morals” breaks new ground for Iceage, with poignant piano under the guitars. You could even call it a ballad, if that’s a fair way to describe a song that feels like a leather boot leaving bloody footprints all over your skull.