Dr Jordan B PetersonVerified account

That's still too big, even different families in nations have diff. customs. Everybody doesn't celebrate xmas.

"national identity" a vestige of state churches, compulsory monotheism.

Although even on the national level that is increasingly threatened by multiculturalism.

It will depend on level of development---obv. individuals more evolved than collectives.

Also, from philosophy, you end up needing cockeyed metaphysics to put individuals into "sets" or "nations"

I'm me, you're you. "We" is just you and me, not a third entity to which we both belong.

No, it's not western bias, the west is virulently opposed to individualism, see Hegel for example.