This is what I don't understand as well. There will be Celtic supporters actually in the forces as we speak, a guy I went to school with is currently in the RAF, and there will be many who have lost their lives over the years as well.
I find it as confusing as Rod Stewart. An Englishman who thinks he's Scottish who supports a football team that wants to be Irish. To make matters worse, he's Sir Rod of course, knighted by the Queen, played at her Diamond Jubilee, and congratulated Boris on his Tory win. Celtic fans weren't happy at that, Green Brigade even had a banner that said Fuck off Rod.
Or how about Trevor Sinclair's tweet about racism the other week. He wants to ask Mark Walters about his welcome to Celtic Park.