That makes me wonder how many cultures only exist in the realm of identity politics. Certainly there is "culture" that white people are the predominant part of

That makes me wonder how many cultures only exist in the realm of identity politics. Certainly there is "culture" that white people are the predominant part of (I'm thinking of the church basement Lutheranism of my childhood as an example), but no one would call that "white culture". What other cultures are a political construction as opposed to a "natural" one?