To me those maps do represent something - identity politics. Slice & dice the electorate into interest groups , promise something to enough groups to get 51%, and then make the other 49% bend over and take it.
No thank you
I disdain identity politics myself, but it is possible to examine how different "identities" vote, without playing that game oneself.
And for what it's worth, the red v blue county maps aren't identity-related, unless we're counting political parties as an identity. They just show how isolated the support is for the Democratic Party, despite their propaganda organs reaching all over the country.