Belonging is a very human need. It improves our survivability. But it's always predicated in someone not belonging, someone being 'other'. On this central dichotomy rests all human endeavour.
That won't be changed easily, obviously. People are way too unquestioning of their own attitudes on anything, much less the deeper baser motivations we might have.
Does that mean we stop trying? No.
The best was of mediating a broader idea of humanity is by openly living it.
To take an earlier point about people not speaking up in groups, I can guarantee you that I am the person who says something, who calls out the bullies and the BS. And guess what, every time I do the timid ones who keep shtumm have less room to hide and maybe will be emboldened by my demonstration they're not alone when they disagree with the cavemen.
