I will change my tone very rapidly if that can be shown.
It can start one way and end in another. They found a molotov cocktail "factory" the other night, reports of websites calling for recruits for rioters, authorities seeing more organised approach.
Time will tell but it doesn't look good, the failure of the French to act vigourously to stop it is a sign of weakness, likely to be exploited.
Remember how a shot in a strange land started WW1.
Even the BBC is rather pessimistic now:
http://www.freerepublic.com/focus/f-news/1517050/posts