That's the historic reason, it makes sense, sounds good and fans on each side will happily justify their respective positions. But for the Old Firm I think the

That's the historic reason, it makes sense, sounds good and fans on each side will happily justify their respective positions. But for the Old Firm I think the more important thing is to both be in opposition to each other. Consider an alternate history where the British Mandate of Palestine being turned into Israel somehow caused Rangers to immediately declare solidarity with the people of Palestine. I don't think this would be an issue both sides of the Old Firm would be happy to share and come together on, and I can almost guarantee we'd instead be seeing Israeli flags proudly being flown at Parkhead on match day. Sorry I have a fairly cynical view on this and having known and dealt with many fans of either side I have a fairly good idea what motivates them, and it always seemed to boil down to conflict above all else. Edit: Just realised that my views may be coloured by being outside of the country for a decade, it could be that I only remember the worst encounters or conversations or that things are better now, or that I’m just sour every team I wanted to do well this year didn’t (Aberdeen were woeful, Montrose and Arbroath didn’t get promoted) :-)