The INTERESTING QUESTION is did the Federal Housing Administration prioritize white wealth and lives by moving them into an area less likely to get nuked by the USSR?
Also kudos for not being a racist...
But you might want to take a look at history. The US government actively encouraged urban sprawl with low-cost loans and redlining starting with Roosevelt and the New Deal.
"Beginning in 1934, the Federal Housing Administration (HOLC) included in the FHA Underwriting Handbook “residential security maps” used to help the government decide which neighborhoods would make secure investments and which should be off-limits for issuing mortgages[...] Green areas were were explicitly homogenous, lacking “a single foreigner or Negro.”