> Looking at it now, German TFR has been well below replacement for nearly 60 years, so I suppose it makes sense.

That's really dumb. It's not that hard to look up population statistics [1]. Without having to say anything on the validity of your last paragraph (I'd have to apply Hanlon's razor before I would be able to argue in good faith), it really has nothing to do with your random tourist observation. There are very much 'white' children (which you probably meant to say, but didn't for some reason) running around in Nuremberg (not "Nuremburg").

[1] https://www.nuernberg.de/imperia/md/statistik/dokumente/vero...