I imagine I slipped in my edit as you were writing, but (given the necessary tech) the Nazis could have created a Europe wide database by collecting DNA.
Indeed. Imagine people being jailed, exiled or killed based on their deviance from some ideal. It's not at all imaginary to me that such a thing could re-occur in the future and there is absolutely no telling where it would happen either. But with lots of countries moving drastically towards extremism in Europe and elsewhere I see little to be optimistic about.
English translation of that piece from above:
[deleted]
It's super crummy (google translate) but it gives you a bit of a feeling of the atmosphere in the original. This is not fiction.
I'll do a better translation, this really does no justice to the original text.
edit: a much better translation, still a quickie but it captures the mood much better:
