what do you think about increase of muslim population in europe? especially i wonder how will islam grow in coming decades in france, germany, belgium and the netherlands.
http://www.pewresearch.org/fact-tank/2015/01/15/5-facts-about-the-muslim-population-in-europe/
pic: density of CONVERTED muslims in france by 1985, 2006 and 2008. (converted density is parallel to density in general, that's why there are less muslims in west france.)