We're talking about two different things here, baseline self interest is good, because it more accurately solves societal problems. There's a better chance you know what you want to do than me trying to think on your behalf, that's ever the problem with socialism, doing things on behalf of others ends up doing everything badly save for those at the top.

Baseline self interest is different from acknowledging your country is going to be gone in 50 years and saying "Oh well I got my speedboat out of it, fuck it lol". That's pathological indifference.

Ethnocentrism likewise is not racism, the muddling of these things into one makes it easier for people to misrepresent it in arguments and sink the issue back into the mud.