Senator Davis, the reason for that particular attitude in France is because they have some issues concerning immigration in the south that are causing some internal problems. They have a robust immigration policy (not as robust as Canada, but considered progressive) but the newcomers to France hasn't been assimilating and there is a self segregation of the Muslim minority in the south. There has been some discord for years, but it's reaching a political stage which is predictably fiery. The result of polls such as this one is a symptom of a greater social issue in France, and they will have to figure out a way to teach traditional French values to a group of people who increasing have no interest in being taught.
This information is second hand, talking to French people, so take that for what you will. I don't suppose there is a French person here that could talk to the subject? I also would be interested in a poll such as this out of Egypt or Turkey, where the Muslim population is more pronounced but the issues are 1000% more personal and complicated.
I should add that I don't mean any of this as an attack on the Muslim faith. Only that the only supporters of ISIS seem to be of that decent, and education and assimilation seem to be an issue. Most Muslims in the western world don't support ISIS.
There are so many ways to come across badly writing on a subject such as this. Even posting articles is troublesome. Here are two, hopefully reputable sources:
http://articles.philly.com/2004-01-0...lim-head-scarf
http://www.gatestoneinstitute.org/35...ion-of-france#