Doubtful it would be human. Much less Nazi affiliated.
Humans cannot survive outside the protection of the Earths magnetic fields.
We were born here (Earth), under ideal conditions that have protected our fragile physiological makeup.
There are no such protections on the moon (or Mars, which I seriously doubt we will never step foot on). Yes. even if you dig tunnels.
What IS on the moon has been there since before man figured out how to record history.
Once man figured out how to read/write/record, documented moon-surface anomalies have been reported through each culture, from all over the world, as far back as records exist.