Ummmmmm ... as best I know, anti-"miscegenation" laws, in states that had them (California did, from what I've heard), haven't been enforced to any significant degree - if at all - in my lifetime. And I was born during Eisenhower's first term as POTUS. Crap like whites-only accommodations were outlawed in the 50s and 60s, and were far from nation-wide. Segregated schools? Outlawed in the 50s and integrated in the 50s and 60s ... where there were segregated schools. I attended, in the 60s and 70s, the same "integrated" schools my parents attended in the 10s, 20s, and 30s (the word "integrated" wasn't even used! the schools just served anyone/everyone in the districts).
Many/Most DU-folk evidently live in the South of the first half of the 20th Century, when such racism and racial discrimination was alive, but dying. Or maybe in the de-facto-segregated northern cities like Boston and Chicago of the 50s and 60s - racism covered with a veneer of politeness?