That's not the point. The point is that the idea of "White" was invented to allow non-Europeans (Jews) to be grouped in over time. By reducing European heritage to a skin tone that many of them are close to, they can more easily slip into and out of this made up "White" category with ease. Ask a bunch of Americans what countries they are from. Most have no idea. They just are "White" and they don't care or know about their heritage. This is by design.
Whiteness is the cumulative genetic and cultural whole of White people. It incorporates but transcends the tribe.