This is a really interesting article on the changes within Islam in North Africa and the Middle East. It looks as if secularism is taking hold around the world, although that might be an overstatement as the research doesn’t say why fewer people are identifying as ‘religious.’ And then there is the whole system of Islam which actually has three tiers of belief, ‘Muslim’ being only the entry as one works their way up. Even so, it’s worth a glance.
(A side note: See that although Tunisia is one of the less religious of Muslim nations, it sees the United States as one of the greatest threats to national security. The two don’t always go hand in hand.)