You barely get the in your face version of Irish republicanism over here that you seem to get from that lot over in Scotland.
I think a lot of it is to do with the fact wee guys over there that support celtic seem to think Irish republicanism is literally celtic football club and the pro IRA songs are just songs for football. I include the likes of Griffith's in that, who seems to think the Irish tri colour is a celtic flag.
He had no idea what he was doing the day he had an empty half bottle launched at him in Windsor Park. Didn't seem to grasp that it is rarely just a game of football in Belfast. Very stupid fella