Nothing wrong with tribalism as long as we're all seeking to understand people from other tribes instead of imposing our own tribe's[1] ways upon them[2]. A little less "melting pot" and a little more "salad"[3] might go a long way towards whirled peas.

[1] and even that "own tribe" has a fractal nature. Scratch a dialect and one finds a collection of idiolects.

[2] my understanding of swiss german dialect history is that there used to be pressure to educate the lower and middle classes to speak "standard" german, as the upper classes did. Developments in the 1930s put an end to that, so now not only do we encourage Romansh https://rm.wikipedia.org/wiki/Wikipedia:Pagina_principala (Mussolini had claimed they were just peasants who couldn't speak italian correctly) but one can tell where politicians and captains of industry grew up by how they speak. Differences are celebrated, not merely tolerated, or worse, steamrollered away. https://als.wikipedia.org/wiki/Wikipedia:Houptsyte gives the flavour of the dialects, but a more academic reference is required for all the isoglosses. (the variety of isoglosses also means that for informal use, SMS, internet, etc. orthography is a matter of regional taste)

[3] in which the constituents retain their identity but taste much better because they're all mixed together.

cultures are a fourier transform of humanity?