America is kinda weird with regards to this because we have always been an amalgam of various white, European ethnic groups. Globally, this isn't usually the case. In most places (and especially prior to communism) racial, cultural, and national identity (and thus the politics around them) are more closely interrelated. This is what allowed Trotsky to weaponize these concepts in the Soviet Union, and also why he did it. Using identity as a weapon against the majority; vilifying their homogeneity, and destroying their resolve, is a well tested means of cultural subversion. In short, because cultural identity is heavily influenced by racial identity, it is part of identity politics. Imo it's something that is willfully ignored in American politics, especially with regards to civic nationalism.

The current year iteration of the Trotskyite tactic uses some extra identities but the goal is the same: same product, they just added some extra troon and repackaged it for sale in America. Having said that, a lot of what we see in America as far as gender identity bullshittery was very prevalent in Weimar Germany. They don't discuss it in schools for obvious reasons, but sexual degeneracy was one of the things the nsdap was able to rally around: in the oft-referenced "book burnings" the main fuel sources were documents that normalized what we would call the lgbt and pedophile agenda today.

In a Machiavellian line of thinking, the state exists to protect the cultural identity of it's population, and that cultural identity has arisen from thousands of years of some form of racial homogeneity. Aristotle talked about it as well. Intersectionalism simply allowed new battle lines to be drawn and new aspects of our cultural identity to be fissured, exploited, and subverted: it's always been about idpol, but because we live in multiracial hellholes now, they've come up with new ways to fracture our societies and cultures; and it also doesn't help that the state now exists to destroy our identity instead of protect it.