when ever Japan is mentioned on the internet the ethnostate advocates crawl out from under their rock

This is nothing about ethnostate, it is just about being who you are as a people with culture. No need diversity, no need PC, Japan be Japan, that's all. Try going for a tour to the entire Asia, from East Asia to South East Asia and you'll know what I'm talking about.

Frequently, the nail that sticks out sticks out because the Japanese person had the audacity to have a black or korean parent.

"Deru kugi wa utareru" I believe? This is something cultural that continues to surprise me in the ways it manifests in society. Speaking as an American though I really can't be throwing stones.

I think you might misinterpret the meaning of this phrase if you think the U.S.A.-man should not be the one to criticize it.

It has nothing to do with race; there are many similar North-West European proverbs that describe a similar tendency that advise against attempting to be exceptional.

U.S.A. society is opposite; it is known to celebrate and encourage exceptionalism and to reward those that have achieved it, or were simply born so.

And even if your interpretation were true, I see no reason why your country of residence would præclude you from criticizing something you disagree with. — the man who feels responsible for the actions of other by association, I find is is also very often the man who assigns responsibility to the innocent by association.

Well you must've spent your life being rejected by the Japanese? It is not like the majority of Korean or Chinese wouldn't smirk at having their sons/daughters with black spouse or Japanese spouse (shocking I know right? but it is the reality, do you know?)? or dare I say, even Arabs, or whites, or south east Asians. There will be people who look down on other people, regardless of race and nationality.

For the record, maybe you haven't met a nice non racist Japanese person yet, that's why your reaction is like that. There are quite a number of mixed ancestry in Japanese society, most of them do fine.

Why, whenever Japan is mentioned, invariably the phrase “the west” is dropped in a context that seems to make it synonymous with “the U.S.A.” or “Anglo-Saxons” at best.

You will find that there are few “western” countries that are similarly interested in “p.c. talk” as the U.S.A. is. — that is very much a condition commonly associated with the U.S.A. culture war.

"Anglo-Saxons at worst" you mean; they have been extinct since the 11th century. I don't understand this right-wing dogwhistle to be honest. It doesn't apply to anyone in Europe or the UK because of its diverse peoples. And ironically, they were immigrants coming from mainland Europe.

Anglo Saxons did not go extinct any more than dinosaurs; they evolved.

“Anglo-Saxons” is a common term to refer to all descendants of the British Empire where English became the majority language.

There are several cultural commonalities of Anglo-Saxon nations; one of them would be it's aversion to swearwords on television and strict adherence to social protocol reflected in it's “p.c. culture”.