From Wikipedia:
http://en.wikipedia.org/wiki/Islam_in_France
With an estimated total of 5 to 10 percent of the national population, France has the largest number of Muslims in Western Europe.
Frances population is 66 Million. That makes 6.6 Million Muslims.
How many of these millions are ISIS supporters?
This tells us one thing ISIS IS already in the west.
Time...to launch CRUSADES II
In very significant percentages in a nuclear-armed state, it should be noted.