I suspect banning them will make them more powerful than they are. What we really need to do with these movements is to ridicule them at every chance possible, do not only condemn them but actively mock them and treat them with the highest degree of disdain. Make it clear that a shitstain is more worthy of consideration than them. We used to do that with the KKK in the US and it worked wonders.
Violence against movements have a history of galvanizing them. For evidence look at the OG Nazis.
Also a ban, imo, does not qualify as violence. Violence would be if the discussion was to purge them like the roaches they are, but that’s not what’s happening.