Anything can be challenged in the courts. And I believe there are some (limited, mainly religious based) exceptions that are pretty recent. But there is nothing

Anything can be challenged in the courts. And I believe there are some (limited, mainly religious based) exceptions that are pretty recent. But there is nothing that protects the political beliefs of a person as this isn’t a protected class. Protected classes protect things people are, not what they think. Trying to conflate 230 here is disingenuous and has no role in a strictly business decision about whether of not a business has to accept a customer.