They attacked al-Qaeda positions ! They were trying to break off a piece of Mali to make their own Terrorist country ! Mali was once a French colony and the rightful Govt. asked France for help . They just didn't go there to kill Muslims ! They went there to boot al-Qaeda out !
qqopp, if you have a real desire to fully understand the Mali situation I suggest you take your research to a more productive area of the internet such as bbc.com. MrJohnWayne is mostly correct in his answer but JuggaloPride is spot on, it is all about RELIGION. Most of the world's troubles relate to religious differences between beliefs of the indoctrinated people.
They are attacking Muslim extremists, who have taken over a nation and are making a safe haven for terrorism. France is saving local civilians and her own people. The idea that they have invaded a country just to kill people of another faith is absurd.