There was a minor fan skirmish at the Celtic v St. Mirren game. St. Mirren took the lead twice only to have Celtic equalize both times. I was amazed that the fans for both sides seemed to be cheering against each other rather that for their teams.
It was a game at the end of last season and didn’t matter for the standings as Celtic had already secured the league title, but the fans sure took it seriously and liked taunting each other.