In fact, it has to be that way given the housing/cost structure of the Bay Area and its ripple effects: https://www.nytimes.com/2018/06/25/dining/san-francisco-rest...
Add to that imminent price increases due to impending minimum wage hike in SF in July.
So America is the only racist country?
While European countries would've been racist as well, it was uniquely American to have, in the country, such a large number of the people they were racist towards. If there's not many people the racist policy would have an effect on, it isn't going to have much of an effect at all.
Anecdotally, when my parents bought their house in the east bay, it came with old (now invalid) covenants that literally said no black people could live there unless they were servants. The house was built in the 40s!