See this:
http://www.msnbc.msn.com/id/10002025/
" The riots have forced France to confront the touchy issue of the poor suburbs ringing big cities populated by immigrants and their French children. They face soaring
unemployment, poverty and routine discrimination."
Its not the same of saying they (immigrants) refuse to teach french or to get into french culture, its much more deep than that: Its France definitely facing the other side, which society just prefer to hide...or pretend it simply doesnt exist...