Since the French police can't handle things anymore, I propose a new French saying: One riot, send in one Legionnaire.
“...send in one Legionnaire...”
The French Foreign Legion is not allowed to set foot in France.
That could work in old Texas, only because the powers-that-be would back up the Ranger's actions.
Yeah, send in a Legionnaire, he shoots or beats up some "refugees/migrants", the EU Court gets involved and demands his imprisonment. The Legion then declines any further involvement.
The French police could have handled it, IF they had the right to shoot-to-kill anybody violently assaulting them, to include any rioters who get started in response to the first shooting. Things would settle down real fast.