Former Celtic star Kieran Tierney has been a Hoops fan his whole life and leaving to join Arsenal hasn't changed that.The left back decided to show his love for the club by trolling rivals Rangers as they looked for pictures from their own supporters of them enjoying themselves at Ibrox.But while Celtic fans decided to invade the post by posting pictures of their numerous wins there in recent years, Tierney thought he would join in.He's got a bit of stick since leaving Celtic in the summer in a £25m move but this might win a few fans over again with this post.Tierney shared a picture of players and fans celebrating during Brendan Rodgers' time at the club with a simple caption of: "stay safe."Supporters loved it with @paulthetim saying: “KT
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