[Moseley]

While I am sympathetic with the tone of the article, there is settled case law that basically states if you open your doors to the public, that means all the public

No, that is incorrect. That is what the news media is trying to tell you these days.

But the principle you state only applies to ESSENTIAL SERVICES -- a "public accommodation."

Not all businesses are essential services, like buses, trains, inns (from when they were rare, not plentiful).

[sauropod]

Seems to me it was a SCOTUS case.

I don’t think you are correct (even though I agree with your sentiment.)