Is xenophobia and hatred of "those other people" ever going to end?

[Igel]

13. Really?

What I see almost daily is a reduction in the attempt to be one nation in order to be part of a "community" that's often defined in opposition to or at least in contrast to another, often dominant group, but which is part of a person's core identity.

"I'm not like you, I'm like them, and they're my group, my community, my identity, and I'm going to even help alter my culture to be less like you." This started off with one or two groups, but it's even spreading to subsets of the dominant group in the US. Sometimes the core identity is race or ethnicity, sometimes religion, sometimes class, but it's most toxic when they're bundled--race + religion or race + class.

We often act or talk like this is a good thing, but the only example that has had this work over a fairly long span is Switzerland. In all other cases there are limited outcomes, not all acceptable:
--centuries of antagonism over any perceived advantage or beneficial distinction, with ways to reduce the advantages (think pogroms)
--assimilation, mostly to one culture but often mutual assimilation, sometimes voluntary but sometimes compelled
--war and often genocide or ethnic cleansing (the norm where small tribal groups are found)
--dictatorship, so that all the little groups are equally hard-up
--further subdivision of territory so that one group won't rule over another (but war and antagonism can still happen)