They’re not saying what this is really about:
this particular princess has a relative who was in the SS and so they’re constantly trying to trip her up on this kind of thing.
They just don’t quite feel right writing a story about her that doesn’t fabricate some kind of racial faux pas.
https://en.m.wikipedia.org/wiki/Princess_Michael_of_Kent
Sometimes this pretentious scion of racial purity writes her own bad press