I've heard that area's around Glasgow, like Motherwell, Wishaw, Falkirk, Largs, Kilmarnock and Ayr have a bigger problem with sectarianism than Glasgow itself and on a match day more incidents occur in these places.
Well, they can have all the problems they want, but they're not part of Glasgow, where the majority of Rangers and Celtic fans are from. Motherwell I can speak from experience though, and that's overblown. Will give Wishaw, but then, I wouldn't go down Wishaw any time of day, week or the year.
These aren't sectarian problems, behave man. They're social problems, like the rough areas in and around Newcastle and every other city around Britain. What do you thinks happening, sectarian riots or something? Will be random scuffles with two sets of supports, again, like any other city around Britain.
You sure most Celtic/Rangers fans come from Glasgow? Are they not the equivalent of Englands Man u/Chelsea for gloryhunting?