Turnstile ’s return to Coachella was as boisterous, unhinged, and powerful as you’d expect from the band who — along with peers like Idles and Shame — effectively have brought hardcore music and mosh-pit energy back to the sweaty Gen Z masses.  This was even as the set lived in the shadow of a news story that broke last week, when former guitarist Brady Ebert was arrested for the attempted murder of frontman Brendan Yates’ dad in a high-drama case that includes reports of blackmail, restraining