I heard about this from a French friend. One thing people should know about the Muslims in France is that a lot of them agree with the ban on the head veil! He told me about a recent article where, I think it was over 60% agreed with the ban. I was a little surprised by that I think.
I also read an article about a lot of pissed off French Muslims who are very angry about the extremists and they make sure they publicly denounce them. Maybe I will try to find that article again and post it here.

Ok I found them here

French Muslims rally against the Islamic State armed group

French Muslims to rally against terrorism after hostage murder