Hearts manager Steven Naismith has just filleted the Rangers leadership group for a failure to lift trophies at Ibrox. The former Ibrox striker – whose unceremonious exit in 2012 hangs over his Rangers career – was talking ahead of this weekend’s Scottish Cup semi-finals. And in comments which only serve to wind the Rangers team up, Naismith reckons that he’s not surprised the Ibrox side have collapsed in the title race. The Hearts manager has had his role to play in keeping the Ibrox side’s title tilt alive, having defeated Celtic twice on league duties this season. But in direct and honest c…