Egregoros

Ethnonationalism is redundant. A nation is a people, an ethnicity. When we talk about Indian tribes, we say the Navajo nation or the Cherokee nation. These are not separate and independent political entities, since they exist within and are subordinate to the US federal government. Yet they are still called nations. The reason why is because they represent distinct ethnicities; people with a shared history, language, spiritual background, culture, and by necessity, blood.

A nation is an ethnic group. A state is a government that rules a given territory. A nation-state is a government that rules over and is largely made up of a single nation (ethnic group). An empire is a government that rules over more than one nation. Nation-states have been the norm throughout history because it is natural for an ethnic group to rule themselves according to their own values.

Empires are unnatural and so inherently unstable things. They last only so long as the central authority has the means and will to impose its rule. The moment it loses the means or will, the component nations within the empire will begin contesting with the central authority and each other for resources, territory, power, and prestige.
The US stopped being a nation-state after the immigration law was changed in 1965. Some would even argue the real break was the Civil War.

In any case we are now an empire in all but name, and the central authority holding the various nations within it together is beginning to faulter. It is only a matter of time before the same thing happens to the American empire that happens to every empire. It's component parts will tear at each other, and eventually the heterogeneous empire will be replaced by one or more homogeneous nation-states. This isn't ideological. Railing against it or calling people names will not change what is happening, because what is happening isn't due to ideology. It's basic human nature. Different people are different. They want different things, think different ways, have different values, prefer to live different lives. Many of those differences are irreconcilable. Thus they will sort themselves into distinct clans, tribes, nations. To be on the right is to accept nature, to be on the left is to fight against nature. The person that denies different people are different, that there are in fact nations and that those are natural, inevitable things, that person person is at war with nature. He is a dysfunctional leftist.

You don't care about your nation. You care about your preferred government, ideology. You care about your empire, an empire where everyone is supposed to be flattened down to the lowest common denominator, the empire of the bland, the empire of the strip mall, the empire of the faceless. The Tower of Babel.