I haven’t been in Amsterdam in years but it sure as hell wasn’t 25% Muslim when I was there. This is a fairly fast demo change. I might have said that percentage about several French cities, so I wonder what THEY look like these days.
Muslim population numbers are deceiving. There might be 9% of population but you should look at how it is distributed between ages. Muslim families might have ten children and local families a single child or childless. In Germany it is normal that schools in ‘non-Muslim’ areas made by immigrant kids by half. In more immigrant areas there might be one or two white kids per class of twenty five pupils.
It is not hard to imagine how it all would look a generation later.