Challenge: End segregation without Federal Civil Rights Acts

IOTL, the Civil Rights Act of 1964 ended racial discrimination against minorities including outlawing separate but equal facilities such as separate drinking fountains and bathrooms.

The Voting Rights Act of 1965 ended Jim Crow laws that had prevented blacks and poor whites in the South from voting.

How could these types of discrimination and segregation end once and for all in the South by 1980 without Federal Civil Rights Acts ever becoming law?
 
The answer to this is that this is impossible and it would not happen without Federal intervention. This is akin to a successful Sealion.
 
You know, excuse if it sounds.. weird or just silly, but I wonders if 1. Polls of opinion where existing already in those days and 2. if America had been asked about Civil rights.

The results would have been.. interesting to read.
 
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