A few years ago Mark Steyn wrote America Alone, a book that took a look at demographic trends precipitated by low birth rates in most developed nations coupled to high birth rates in mostly Muslim countries.  He predicted what is unfolding in Europe.  Indeed if one were to carefully examine school enrollment data for Holland one would note a sizable up-tic  in the percentage of children who are Muslims.  This is a statistical reality and if Steyn is correct in his thesis, fifty years hence Europe will be unrecognizable.