A nation is a body of people with a common thread. What do Americans even have in common anymore?
Blood & soil? Nope, that's racist.
Borders, language, and culture? Nope. Neighbors don't even speak the same language anymore, let alone have the same culture.
Belief in God? Nope. Which god, anyway?
The Constitution? Nope - there's many that bend or outright ignore it when they want to.
We have a completely disjointed country with low social capital. It's almost like we shouldn't have wham bam jammed every race, religion, creed, ethnicity, ideology and culture together and thought everything would be OK. A civil war is unavoidable at this point; maybe a hot one, but certainly a cold one is coming.