This is the America I grew up in. If you think it’s vanished…just because you don’t see signs like this, anymore, you’re dumber than a hoe handle. This level of racism still exists. Everywhere in this land. Yes, there are solid reasons it’s not as blatant as it once was. Mostly economic. Person-to-person, that doesn’t mean a whole helluva lot.
If you encounter this crap, let the source, individual or business, know how you feel. “Polite” is not required in my humble opinion.