And maybe interesting, or dangerous depending on the point of view, amongst the rioters you got both far-left and far-right movements on the same side, which is something that does not happen that often.
Far left would be anarchists, black-blocs, and a few communists in there too.
Far right would be openly pro-nazi, or Vichy nostalgic small organizations like Oeuvre Française and other dissolved and then formed again groups. Add unaffiliated fascist skinheads in the mix.
Then again, almost every nuance of the spectrum between those two is represented in the protesters.