Domen
Misico dux Vandalorum
State-enforced dress codes, and entirely novel ones like that, are absolutely no indicator of subjective identity
Why are they not such indicators ??? If not them, then what is ???
You say, that "subjective identity" is such an indicator. But there is one problem...
You don't have statistics on "subjective identity". You only have statistics on state-enforced identities, which are reflected in population censues.
Look. For example Poland in its 1931 population censuses, counted people as "Poles" basing on their self-declared primary language (mother tongue).
This is why during the 1931 population census for example 371,821 believers of Judaism were counted as Poles.
Number of "Judaistic Poles" increased to some 415,000 by 1939 (strangely they are still counted as Jews not Poles in modern data on WW2 losses).
That was a "state-enforced" identity, as in reality perhaps some people who didn't speak Polish identified as Poles, and some people who spoke it didn't.
Such situation was in Galicia, where some people spoke Ukrainian but identified as Poles and some spoke Polish but identified as Ukrainians.
But the same "linguistic" method of counting nationality / ethnicity was not the case in Nazi Germany. Not at all.
In Nazi Germany they had categories of people like "Halbjuden" (1/2 Jews) and "Vierteljuden" (1/4 Jews).
In pre-war Poland all Jews - no matter 1/4 or 1/2 or 1/1 - were counted as Poles if only they spoke Polish as mother tongue.
On the other hand, Polish Jews who spoke Yiddish or Hebrew as their mother tongue / primary language, were counted as Jews in 1931 census. In Poland also Atheists, Catholics, Protestants and Orthodox people were counted as Jews, if only they spoke Yiddish or Hebrew as main language.
And in Germany "1/2 Jews" and "1/4 Jews" were counted as Jews, even if they spoke only German and even if they were not believers of Judaism.
So as you can see the method of counting and the method of classifying really matters (at least when it comes to statistical data).
Today it is hard to establish the estimated number of "ethnic Polish losses" in WW2, because historians still argue who was Polish and who was not.
There are less problems with establishing the estimated number of citizens of Poland who died during WW2.