Well, I took care of taking neutral screenshot. And I added the legal warning on the Demo and the "full" version has no data inside.
Screenshots don't matter, it's simply illegal to distribute media with "propaganda" content (meaning swastikas and stuff like that in this case) in Germany.
The "full" version might be okay, since the files located on EDs server indeed do not contain any of this (I am not sure, an expert on German law would have to check this), but the demo surely falls victim to the law linked in my last post.
For the record, there also is
an altered German version of the game, which should not run into these problems. It might be worth considering distributing the demo with these altered data files.
(Though additionally any version of the game must not be made available to minors in Germany, which currently cannot be insured by the repo software...)
I am sorry about this, I have no intention to harm your efforts, just some precautions to avoid any legal backlash.