His request was inappropriate to begin with.
If she had erected a sign on his property yes, then he wuld be valid. She had a bumper sticker on her car. Did he have a consistent policy about bumber stickers?
I must wonder why you chose to give so much power and control to an employer over a persons behaviors that are not illegal.
What makes the business owner all so powerful to you?
The business owner owns the business. I believe in private ownership and minimal governmental intervention in private affairs. As the owner, he gets to run it in any legal way that he sees fit. If he did not want to have hard-core liberals working for him, that is his choice. She chose skerry over loyalty to the company. He did not ask her to perform an immoral or illegal act. Therefore, she had to make the decision what was more important - a job or making a point. She chose to make a point. Her loss. The company is probably better off. I would guess that even if she stayed, she would be a bone of contention and causing unrest.