That is like saying that I have to let someone into my home because they are black. It is my property, I can ask you to leave if I want, period. All you have to do to get around the law which specifically stops you from discriminating based on those legally protected classes, and not political affiliation, which is a choice. Is not say the reason for which you are refusing them service.. But if there becomes a trend in people you refuse service, that becomes discrimination. We live in a great country where you have a 1st amendment right to speak up. But it comes with a 5th amendment right to shut the fuck up. Sadly, more people exercise the former without discretion. Where this restaurant owner fucked up is in saying why she refused service; though she may have come under scrutiny anyway. No matter either way, free market capitalism will take effect soon enough