Sometimes the court can uphold the law and yet an undesirable state of affairs can persist. Those comments were racist, and furthermore it seems the family has not acknowledged that fact or apologized for it. This would definitely affect my likelihood of shopping there--all else being equal, I'd greatly prefer to have business owners in my community who don't espouse racist beliefs.
I can no longer edit my comment and feel the need to add to it: upon reading the FB post (https://tinyurl.com/2h9rmkzu) this points to the bigger issue that is worth at least mentioning. Often people who are not very eloquent try their best to state their (sometimes naive but often not ill-meaning) views, instead of being treated as the beginning of a conversation (in which the person is validated and a dialogue forms), their words are publicized and they are demonized, which polarizes the issue. It is deeply unfortunate that in this case somebody chose to publicize rather than attempting to start a dialogue.