So what's the problem? When you see someone about to burn your car, shoot them! Oh, that's right, you gave up the right to defend yourselves and rely on others to protect you. Good luck learning how to say "I surrender" in Arabic.
The citizenry is not armed. The few police who are armed are not allowed to shoot.
The government also does not appear to recognize that this is not simple rioting, but an organized terrorist activity. The target of the torching is government buildings and transportation.
I suspect arms are being shipped into France for the rioters use, as we speak.