I'm not sure your inverted example works unless you also invert around 500 years of international history.... My point was that in poorer areas of the cities I lived in (Bolton, at that time, if anyone is wondering) the separatism was either absolute or non existant, depending on which area you lived in.
The mixed areas seemed to be far nicer places. As a kid I was always a stranger, we moved at least once every school year, so I have a lot of experience in fitting in and the spaces that were most comfortable were the most mixed, ethnically.
I've said on other threads, prompted by a poster whose name I didn't remember. I was brought up in the era when not seeing skin colour was the cure for racism and othering. In all of the schools I went to, CofE one and all, rural one room school houses and inner city comprehensives alike, we all sang Kumbaya and The Child is Black, the Child is White and believed that we were all the same under the skin as well as under the sun. That 500 years of international history was being addressed and hugged into pleasantness.
A decade later we were gender bending and androgenous and didn't equate make up with female etc. Had no truck with the idea that clothes made the man and all that.
Now, after 20 - 30 years of supposed progress, we seem to have forgotten all of that and are making new rods with which to beat ourselves. And I don't understand it because my own life experience quite closely matched the happy clappy, don't see it, it doesn't matter teachings of the time.
I suppose to save the angry comments I sould point out that skin colour blindness that didn't mean we didn't explore the differences. Quite the opposite in fact. We were just taught that it was like hair colour, eye colour, different accents and languages. All part of the great smorgasboard of humanity.
Fuck! That makes me sounds like some prudish paragon of lost virtue! 