The question is - do you let this fire burn itself out and contain it - or - do you attack it, and run the risk of making it flame up even more.
Confrontation is the best course of action, unless one is fond of being manipulated by fire.
I think it is more apt to ask whether you retain your ground or yield it to the insurgents.
Sure as heck, the "north african students" will own the territory they rioted through - except for the small patches close in to the center of Paris. The french will have to formally observe the defacto control that the rioters have claimed all along.
Diversity set in concrete is not the kind of 'containment' any government should desire.