Says you.
But then again, I'm a secluded introvert from a country that's 45% immigrant families, so what do I know.
Says I and most of Europe apparently, otherwise I'd be speaking to you from the United States of Europe. We're still knee deep in old world thinking, especially the UK. People are still fighting and dying for the sake of nationalism outside of Europe but in those areas "ethnicity" and "nation" blur, as in Mali, Chechnya, Sri Lanka, Philippines, Myanmar etc. The idea of civic nationalism hasn't exactly reached those areas yet.
I think nations have to go through a process of breaking up into smaller ones based around what people are most comfortable with (usually historical lines i.e. the original tribal kingdoms that remain very clear to us to this day), ensuring no Moscow, London or Madrid based elite controls any more empires. Those movements must be based around civic nationalism, not ethnic nationalism. Once states are formed by people who are united in their commitment to their nations and their desire to make it better regardless of their heritage, then we can all get on with our lives, form bigger, peaceful federations or whatever. The world just needs to get this old world stuff out of its system, all of it.
If we don't do this and keep it all simmering under the surface as it is now then stuff like ethnicity can bubble to the surface from people frustrated and confused about their identities. That's when things turn ugly.