Do you know exactly what the motives were like?
Not sure if sarcastic, but no I don't know the motives. It could even have been Celtic fans that did the stabbing, I've not checked and don't intend to. But I live in Glasgow, I endure Orange walks every single weekend, and see these morons clad head to toe in their Rangers gear trawling the length of the city looking for fights based on ethnicity, creed and sometimes just in proximity to them. That's on the days they're doing the walks. It's amplified on Old Firm day. Especially just after their 'Brexit day' was taken.
Celtic, for all their s****, haven't chosen to smash the city centre when they've won the league each other year of the last decade. It really would be odd for them to start now, in their own part of Glasgow.
EDIT: From what I've heard it all started after Rangers fans went into pubs stabbing people. Footage you see of Celtic fans attacking a pub is the apparent retaliation. Whatever you do, never let them into the English league. The both of them are scum.
It was just your Rangers fans comment, suggested you were blaming it on them.
I never got why we had Celtic as opponents for Beardsley and Shearer's testimonials, smashed up town both times apparently, idiotic inviting them.