Depend which kind of Neo-Nazi organization (they are illegal in France and most of them in France do like to punch people and say it), and co-organized with whom, and depend on what is saying these Neo-Nazi
But for sure I do blame Neo-Nazi for being Neo-Nazi !
A significant majority (67%) of the currently active low ranking French police force (not counting the retirees) vote, or at least declare they intend to, for one the parties that has historically been as right wing as one can be.
Taking that into account, one could have reasons to believe cops wouldn’t be as tough on protesting fascists, and that protesting fascists wouldn’t be as violent towards cops.
Though I’d be curious to see wether or not facts support this hunch.
But for sure I do blame Neo-Nazi for being Neo-Nazi !