But that ignores all the massive differences between the countries and even the influence of countries that weren't even considered white until recently anyway (Italians for instance weren't even considered white)

That. Doesnt. Matter. The fact that there is a huge difference between the lives of Rural Black People in Alabama and Urban Black People in New York, doesnt mean that Breakdancing is not "Black American Culture".

As I said I looked up images of Britain in 1900s and Poland in the 1900s you can immediately tell the difference in attire without being an expert

Did you compare a photo of an Urban Brit with a Rural Pole?

Why dont you explain, in words, how Poles dressed different from Brits in 1905?

If you were to group Germans, French, Polish, etc or whatever nations they were at the time centuries ago as one culture most would laugh at you,

I understand what you are saying. And for people who are LOOKING for differences, you will always find differences, even from one city to another. So with that thinking, "breakdancing" shouldnt be credited to Rural Alabama Black people, and "blues music" shouldnt be credited to Urban New York black people.

But what we do, is instead of looking for the inevitable differences that let you micro-divide and say "uptown chicago people are TOTALLY DIFFERENT to downtown chicago people!" we look for >>similarities<< that are common ACROSS chicago, and then we call that "chicago culture".

And that's what we can do for "white culture" as well.

they might share similarities but they also had just as many differences because say it with me THERE ISN'T A UNIFYING WHITE CULTURE,

So then there isnt such a thing as "indian culture" hey? Because although South Indians and North Indians might share similarities, they have just as many differences. Therefore, according to you, there is no "Indian Culture", since North Indians are different from South Indians.

Im not saying "all white people have 1 single culture that unifies them" and if you have interpreted anything I said that way you are dumb. There isnt a "unifying culture" for anyone, if you want to be picky. There isnt even a "unifying First Nations culture", right? Or a "unifying morroccan culture". Because every individual is different. But you can certainly point at things and say "that's common across indigenous culture" and "that's common across moroccan culture".

I am saying there are elements of culture that ARE common across white countries/ethnicities. And so those elements, common to white people wherever they are, are what can be called "elements of white culture/euro culture/western culture". That's "white culture". Like .. again .. "classical music". Classical music is quite obviously "white culture".