That sounds like someone who just replied to someone who posted a stupid comment about the French or European situation without knowing anything, that's actually very common in your country, but as you said it is mainly your media's fault.
No, It's not.
Actually, recently, an atheist in my town went and killed three muslim college kids saying that his answer to problems in the middle east is "atheism".
Honestly, most american muslims are just really nice normal people.
Most of the time it's an honest mistake that happens in the rush of things. The real fault is news stations not looking over the material and correcting it before putting it on TV
Like the guy who went and killed 30 something people in a theater in Colorado; they immediately jumped on the fact that he belonged to the Tea Party xD. Turns out it was a different person who had the same name.