Lions prefer lions. Hyenas prefer hyenas. They coexist. But they prefer the company of their own. And that's ok. It is nature.
No need to add complexity. It's nature. Always has been. Always will be.
Ironically, America in the 90s and early 2000s seemed to be approaching a sweet spot where cultural expectations and “mild” authoritarian policing were successful at crushing urban crime rates. This whole thread is full of longtime West Coasters bemoaning how much better city life was in “the good old days” of 10-15 years ago. Odd how there’s zero political will to simply go back to what worked.
Also worth pointing out that homogeneity isn’t only along an axis of race. Example: There are plenty of Mexican Americans who are extremely racist towards newer Mexican immigrants to their neighborhoods. LATimes has done several pieces about this dynamic. People will always find reasons to put other people in categories.
Also worth pointing out that the society in Japan is more overtly racist towards outsiders of any race. My source is a life-long friend (white American living in Japan for 15+ years) who overheard lots of conversations when the locals think he doesn’t understand their words.
America has been a “melting pot” for a while, so we have moved our racial/homogeneity issues at least one layer below polite discussion. Most Americans will put up a façade about not being racist, but don’t actually put any effort to align their behaviors.
Sadly, I think identity politics has tossed the melting pot ideals aside. It encourages zero sum thinking where different groups are enemies and relative sucess is what matters. This means pulling others down is just important than lifting people up. Unfortionatly, it is easier to pull people down than lift them up.
Crab bucket mentality in practice.
My theory racism and identity politics have a positive feedback relationship. That is to say identity politics is counterproductive at bringing about a less biased society.
Yes, Japan is a very high-conforming and ethnically homogeneous society. It is also a low-crime society. However, to derive just from that that absence of racial homogeneity alone leads to high crime makes no more sense than claiming that not using logographic scripts leads to violence - since Asian society are generally less violent than, for example, the US. You need to do much more work than just picking one difference and attribute everything to it.