It's funny how people can attach different loyalties to similar situations. Should you be more proud of being a Rotherhamer than being English or vice versa. Or should you have the sane loyalties. I would suspect that people who have a military upbringing or culture would be more Country than club whereas people who are maybe more distanced from the military may be the other way round. I would argue that generally left wing politics is less nationalistic than right wing politics. Notice how extreme right wing groups often attach themselves to the England football team. Maybe a bit simplistic because it is obvious the likes of millmoormagic and raging pup on here are obvious lefties but quite nationalistic as well.
Myself? I think too much jingoism and nationalism is a dangerous thing (its ok in small doses eg for a footy competition admittedly) especially when right wing nutters attach themselves to it.