"Is it French, who spent a hundred years at war with the British?"

Yes, it is. Just like Scottish and English cultures are really similar despite them waging wars for centuries. Before what was at least 18th century you'd usually go to war with those close to you. Your idea that some two cultures aren't white because they used to wage wars just shows how ignorant and stupid you are.

"German who tried to erase and supplant the culture of both?"

Germany never tried to erase and supplant any of these cultures. It fought wars with them but never wanted to completely erase them, just like it didn't erase the French in 1940-1944 but simply garrisoned parts of the country.

"Is it American despite being a country of immigrants who took multiple structural cues from the Natives they pushed into a corner? "

Yes, it used to be and still is given that the first settlers and most migrants before 1965 were white. Organization and administration of the US was never based on the model of Indian societies which never even reached the cultural level needed to create states.

"Is it just any country where a significant chunk of the population is white?"

Where the native population is white. Just significant chunks isn't enough.

"Or is it just any country that has prosperity that you want to claim for your own and shoo away anyone who thinks that if they work hard enough they could have the same?"

How would that even work? If a black country where prosperous who in their right mind would claim that the population is somehow white?

"Because you know what I hear every time somebody goes on about "white" culture? I hear you saying "GIBSMEDAT" because you can't amount to anything without riding on everyone else's shoulders and coat-tails."

Thanks for revealing how you really see white people, who created progress and technology for the rest of the world. You're self-hating pathetic moron who should be wiped out from this planet.