Sigh. The owner acted with what I would consider a measure of civility towards Ms. Hucka-Sanders, though she did request her to leave. But her life and restaurant has now just been utterly trashed. Had someone, say, done a similar action during Obama's admin, I highly doubt the reaction would have been anything like this. And HE definitely would be attempting to calm the waters, not roil them even more!
If you are open for business then you are open for business to all. If you deny someone for political differences, then why not for religious differences, or racial differences. If she wasn't causing a problem, serve her and let it go.