Why are white people the only nationality on Earth that aren't allowed to have their own home?

Is it "racist" that Somalians have Somalia, Indians have India, or the Chinese have China?

I think it's wonderful that all of these ethnicities have their own countries, where they can be surrounded by a supermajority of those who share their unique culture, allowing them to pursue their destiny together without having to deal with ideology-conflicting foreigners being flooded into their space against their will.

This is how true #Diversity is cultivated - by giving each different group their own nation(s) where they can build their culture in peace & harmony amongst their like-minded tribe, without being forced into unwanted conflict with outsiders whose culture will inevitably create friction with theirs (the resulting cultural dilution and inevitable clashing of ideals is the OPPOSITE of diversity)

I'm fully open to all good-faith arguments here; I truly want to understand the reasoning behind whites' sole exclusion from this universal right to #Nationalism.