Why might the term, "unclaimed land," as it's used in official decrees like the line of Demarcation, be an inappropriate name based on what we know now?
Ready? Ento, pur answer here

i confess that there are several parts of this constitution which i do not at present approve, but i am not sure i shall never approve them: for having lived long, i have experienced many instances of being obliged by better information or fuller consideration, to change opinions even on important subjects, which i once thought right, but found to be otherwise. it is therefore that the older i grow, the more apt i am to doubt my own judgment, and to pay more respect to the judgment of others.

c) they were beaten and fired from their jobs.

the term is einsatzgruppen