There's no 'white' culture, there is modern North American culture and it's not something that belongs to a particular complexion. It's norms and traditions. These aren't remotely under threat of extinction from 'race mixing.'

The things that are under threat are the contemporary cultural values of openness and acceptance of other cultures/relgions/traits. These are truly valuable, positive aspects that stand out in contemporary American and European societies, and these are the things that are legitimately under threat, ironically, by those who attempt to normalize racism and xenophobia.

USA has a long history of erasing culture. If there is a lack of “white” culture it’s more the fault of other white people not “woke” culture. EVERYTIME there’s a new ethnic minority in USA they’re forced to assimilate through persecution and through the school systems.

no

White Americans descend from a number of cultures that voluntarily moved here and involve food that thinks pepper is spicy.

Slavers deliberately mixed different groups of kidnapped Africans so they had no shared language and sold their children so they couldn't pass anything on to the next generation.

We are not the same.