imho violent anti-social behavior is wrong no matter what the provocation. if they want to change the situation they find themselves in, there are proven non-violent methods that have over the years forced the brits out of india, broke down the berlin wall, freed the warsaw pact nations and democratised the soviet union. while there were some violent repercussions to those, the violent elements there were also wrong.
it is especially idiotic to burn down your own groups homes, and businesses, and destroy your own sides possessions, at least the elements who cannot control their emotions constructively should be smart enough to go burn some other groups area instead of their own. if they cannot behave legally, are too impatient to follow legal channels thru the french and/or EU govt. channels, and want to act like barbarians, they deserve whatever containment tactics the govt. decides to use against them.