Riots tend not to do too much good. Peaceful protest is allowed of course
...and achieves nothing all, rioting/breaking the law; got us the vote, got rid of the Poll tax, the riots in France have already change the rate of change of the new fuel taxes and got them a meeting with Macron.
If the 700k anti brexit/anti Iraq war protesters had smashed up central London, the Government would be forced to listen.
However, we need a sense of perspective here, France has a population of 83million, a tiny tiny % are protesting, let alone rioting.