Idiots with AK47s shoot at tanks all the time. I can't see anyone who is armed either. The camera dude is running away for almost the entire time the firing is underway so you can't really tell who is firing at what. And there isn't any dialog to explain what is happening. They may not have been taking fire in which case they are poorly trained and poorly led troops who just shot randomly into the crowd - murderers led by murderers in other words.
I don't like the snoty French butt-plugs any better than you do. So if they're guilty, they will be hearing plenty from me.
http://radioci.embaci.com/englishdownload/frenchsoldiershootingcivilians1.mpg
It starts with a fairly normal protest crowd, chanting, singing, and gestures (mooning, Kiss my a$$, type of stuff). Rowdy, but not especially acting angry.
There is a cut in the video, to (from behind a wall) the troops. No one appears to be close to the troops.
The troops appeared to be firing over the crowd, from across a street/sidewalk, behind barbed wire and bushes, from on top of the vehicles.
IMHO, this just made the crowd mad, although there appeared to be some wounded.
My bet is that after that, the crowd started getting really ugly. Expressions on the faces looked like they were 18 shades of pi$$ed off.