Kudos to that brave woman, daring to bring to light this subject. Personally--and I may now be called racist--I believe the French did the right thing in banning the burqa and hijab in schools. It is a symbol of subjugation. My daughter had in her friendship group a nice Muslim girl who wore a hijab. Even in 40+ degrees she had to wear jeans or longs pants and sweaters up to her neck and covering her arms. She begged her mother for months to please allow her to go to school without the hijab; she wanted to fit in with the other girls. The mother called her daughter a 'sl**'. One day the girl went to school without her hijab. Her mother threw her out. The authorities rang me to see whether I would look after her for a week or so. I said yes. During that time it came to light that the mother frequently beat the daughter with hairbrushes, etc. The girl had to get up at dawn and make breakfast for everyone. She couldn't go anywhere after school or weekends because she had to look after the baby the mother had just had. It also came to light that the father was sexually abusing the daughter. The mother found out, knew about it, but instead of throwing out the father blamed the daughter and threw her out. It was a mess. The poor girl finally got out of the house but is now left with all kinds of issues.
I don't think that socio-economic status can be an explanation. Most of the post-war migrants from Europe were from the lower socio-economic groups--farmers who had left school at about 8 or 9 because of the war. They also came and worked as unskilled labourers, and their children grew up to be contributing members of society and many went to university. I believe that, in the hierarchy of the Muslim home, the mother is beneath any male child; therefore, she is not allowed to reprimand or discipline him. All the little Muslim girls in our playgroup were delightful, polite and sweet.