The Danish, Sweds and Norwegians had a dust up called the "Nordic Biker Wars" as the local chapters of the Hells Angels and the Banditos biker gangs started using dirt cheap AK-47's and rocket propelled grenades on each other's club houses and across the Coppenhagen (sp)? International airpower as a part of the drug trade.
All three nations cracked down on the biker gangs. This was aided by the fact that the locals involved were all white.
The problem for the French is that the Muslim quarters of their cities are now rife with both Islamists and organized crime.
I'd bet that the Islamists in France are now more heavily armed than the French police and a large part of the P.C. campaign by the French authorities is an attempt to avoid that subversive fact from getting out.