I think your view of the world is very naive.
You can't inject political Islam in the French secular-with-deep-Christian-roots culture for the same reason you can't inject San Francisco LGBT culture in Baghdad.
Peoples and nations have histories, cultures, roots. You can't just copy/paste people around and expect everyone to be happy. The world has never worked this way.
Peoples and nations have histories, cultures, roots. You can't just copy/paste people around and expect everyone to be happy. The world has never worked this way.