[mariusor]

> If he bothered to spell out in detail what he means by "tribalism,"

He did though:

> Under conditions of real or perceived out-group threats involving competition for scarce resources, for example, the disposition for tribalist and exclusivist responses is triggered [...]

I suspect that the existence of country borders and ethnic identities is safe as long as they don't support themselves on the fear of the "outside world" and the "other".