. >> olivier bobineau teaches the sociology of religion and lives himself.he's a catholic who wears a small cross on a chain that he keeps hidden most of the time. but one night, at a meeting with high government officials so you leaned forward, you could see it, and somebody said -- >> careful. >> put that away. >> yeah. today it's unimaginable to go against the state, against the public space, and to show a cross, a skullcap, a veil. it's impossible. it's wanting to destroy the state. that's what the french feel. the majority of french people do not think it's possible to be french and muslim. most french people think you can't be a citizen and believe in god. we are the most atheist people in the world. why? because when you are a believer, in france people think you have lost your freedom, your reason, okay? >> the french also remember the violence that broke out across the country a few years ago. for two weeks, young muslims angry about unemployment and discrimination took to the streets and burned thousands of cars, and that anger has not entirely sub