Earlier quoted context omitted.
No, I'm fine with any individual who sells food (or any other thing) being able to opt to not do business with anyone they like. That's a big difference from what you claimed. That's actually already true now (outside of protected classes). Any restaurant can ask KKK members to leave if they so desire. Same with any supermarket. Any individual proprietor having freedom of association is a long long way from "specific…
How do you draw a line between religion (protected class) and other ideologies/oragnizations/beliefs that you don't want protection for? Where do, eg Scientologists, Pastafarians, and cult members fit? Is it right to be able to exclude Islamists (political ideology) despite them being Muslims (religion)?
The legal lines for what is or isn't protected are fairly well defined, by people other than me.
My own personal opinions and beliefs on the matter don't count for anything.