Not to sound flip, but as opposed to rational intolerance?
But I digress. I just love how people go around saying "Corporations are so greedy, they will sell their own money to make a buck", then also go around saying that they will indiscriminately discriminate against people and turn away their money just because they don't like the color of their skin, religion, sex, blah, blah, blah.
It's kind of hard to have it both ways.
But what many people fail to understand is that even if that is allowed to happen, and company A refuses to have person x as a customer for reason y, that creates a market for a new company, company a, to come in and get that person (and others) as customers.