Liam Gallagher insists he’s a “kind-hearted” person, despite his hardman reputation. The 51-year-old frontman has had a 14-year feud his brother and former Oasis bandmate Noel, 56, caused by the guitarist’s decision to quit the ‘Supersonic’ band in August 2009 in the wake of backstage bust-up at the Rock en Seine music festival near Paris, which ended when Liam allegedly tried to strike his sibling with a guitar. But the ‘Just Another Rainbow’ singer insists he’s nothing like his reputation and in reality he just wants to get on with people and have fun. In an interview with Rolling Stone Ital…