I defy you to find one example in the 1950s conservative South of someone going out of business because they refused to hire African-American as something other than a janitor.

For the modern age, I point at Chick Filet, which is doing just fine despite its clearly bigoted perspective and policies.

It simply isn't true that discrimination will work itself out on its own. Hell, that's the same argument we made about slavery. How long are we going to make that argument?