Well, that’s one theory.
However given pictures of the Nazi logo on Bell shaped and saucer shaped stuff, there’s another theory that the Nazi’s had some bad a$$ military stuff - enough to defend their camp there.
Then there’s another theory regarding fallen angels or demons/other dimensional beings helping the Nazis there.
None of the theories are entirely satisfactory to me. I can wait to find out for a few more years.
I suspect it will be alternative 2 more than any of the others.