There’s a famous saying amongst Rangers fans that those who don’t understand, don’t matter. It’s a mantra which remains central to the experience of following the Glasgow giants, a club which has a following amongst the most loyal, if not the most loyal, in the global game. From the highs of Rangers’ storied history to the depths of the club’s financial collapse in 2012, the support of the Ibrox faithful has never been in doubt. It’s a special relationship and one which many, metaphorically at the very least, would be willing to die for. And that’s what one famous Scottish musician has been ta…