Ah yes, just close your eyes and cover your ears and shout youre wrong.
Either you are made to open your business to everyone or you get to pick and choose. There should not be an inbetween.
And if there IS an inbetween, your government and court system gets to decide.
Its the same, rather you like it or not.
You say its because of her political stance. What if your political stance as a shopkeeper is people must be segregated by race or religion? Then what?
Whats good for the goose is good for the gander. So if you want to be able to ban people for political stances, you should be able to ban for religion stances.