Rock legend Sir Rod Stewart launched into a furious verbal onslaught against radio star Simon Jordan, demanding he “shut the f*** up”. The Maggie May singer took to Instagram Stories to post a statement arguing against the TalkSport pundit’s recent remarks about Scottish football. It came after former Crystal Palace owner Jordan made “disrespectful” comments about the likes of Celtic and Rangers. Stewart, 79, a Celtic Football Club fan, didn’t hold back as he addressed the subject. In view of his 1.4 million Instagram followers, he penned: “I’m absolutely sick and tired of the constant deridin…