It’s hard for people to realize outside of Florida and many other states in the south, but segregation doesn’t exist for a large part.
In comparison - California is very segregated.
Most people live in neighborhoods with similar ethnicities in CA.
“Based on the Census analysis, the top five most segregated metro areas were Milwaukee, Detroit, Cleveland, St. Louis and Newark, NJ, according to the Chicago Sun-Times.”
My guess is that this is due to when people migrated or were brought to California (and elsewhere). In terms of California it’s largest population spikes were during the gold rush, the turn of the 20th century, and post WWII. There wasn’t a socio-economic structure to allow them exist outside of their cultural community.