It's in Australia I heard about that. I read the Free Republic and haven't heard it mentioned here.
http://www.guardian.co.uk/international/story/0,3604,482120,00.html
I realize that the source of the first link is a controversial figure, but, while there may be cause to question his overall views, there is little cause to question his accuracy on this particular point.
Not that this behavior is limited to France, or Australia, for that matter. It's happening all over Europe and seems to happen in proportion to the number of Third Worlders present in a particular nation.