White race is not a race, but a culture

Whiteness is not about having a white skin, blue eyes and light hair. Those are irrelevant to actual whiteness. You could have all of those and still be a non-white, simply by not having white values.

Whiteness is about intelligence, celebration of intelligence, but also about empathy.
A smart black is whiter than a dumb "white", for example a slav.
An egoist "white" who implicitly - even just through his choices of everyday products - supports exploitation, factory farming, dictatorships, is not white.

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The person-being born inside Western civilization absorbs and internalizes cultural values and unwritten laws of this civilization

Wrong again. Being white doesn't mean being a pathetic slave, literally cattle mindlessly consuming entertainment and sweetened cattle-feed as though it is literally grass. You can only be white if you actively reject the cultural values and especially the unwritten laws of "western civilization".