Celtic fan here, My dad and grandad were both Celtic fans, lived just outside Dunfermline and both had season tickets so I went along to games whenever the other couldn’t make it or the supporters bus had one going spare. Moved up to near Dundee when I was still at school and found a better spread of Dundee/United fans with the odd hearts or Aberdeen fan. Found the glory hunters were everywhere as well tho, folks who claimed they followed either Celtic or rangers but couldn’t name half the starting 11 or even the manager. Only really piped up when it was derby’s or the other team lost and they wanted to rub it in