What’s probably most striking about tonight’s annual Kerrang! tour performance is the absence of side fringes and panda bear eyeliner. While outside there are a plethora of young folks trying to convince the bouncer that their older sibling’s ID is their own, the crowd inside the venue seems to be within their early to late 20s. This is the Kerrang! tour; the purest distillation of angsty misunderstood youth that a €3.50 magazine can offer. So why is the crowd from Animal Collective or TV On The Radio here? Does the long awaited return of pop-punk legends Sum 41 really inspire…