Before 2015, Germany’s Muslim population was around 5 percent of the whole, potentially rising to 7 percent or so by 2030 [Note--see the Pew/IIASA projections that came out earlier this year]. If the present wave of migrants and refugees continues, that figure could well be 15 or 20 percent by the 2030s, and it would be rising fast. For the first time ever, we would seriously be looking at something like the Islamization of Europe that has been a nativist nightmare for a generation. And in the German context, that process would be squeezed into just a couple of decades. That is radically destabilizing.
Personally, I don’t believe that the presence of Islam in Europe need of itself be harmful or even negative, nor that it would necessarily lead to violence. But I am quite certain that numerical changes on this scale do portend a cultural and social revolution without precedent.
Shouldn’t the Germans, and other Europeans, at least be allowed to discuss this openly?
I think that this is a reasonable point. Not all of the refugees are Muslim, of course, and while that shouldn't matter, the point I've often made is that "differences" matter when it comes to immigrants, whether it's language, religion, status of women, or anything else. These issues need to be out in the open in order to promote accommodation, adaptation, and integration, rather than discrimination and ghettoization.