I'm not a fan of face masks as a way to fight viral disease, but if a business requires them, it's not usually a line in the sand for me.
I'm not a fan of Covid-19 vaccines or experimental gene therapies, but if a private business or a corporation (which is government) says "no unvaccinated person may enter", I'll shun them and take my business elsewhere. Yes, I think they are being foolish, but I have no control (with a mask or otherwise) over whether a virus will be released from my body if it were to be present in me, so it is their business, even if their fear is silly and hysterical.