So what if there were "legal quibble"? As shown in my post, Mark Dupont stated that all employees were familiar with the rules and regulations of the school, and it was grounds for termination if they violated them (like most if not all businesses do).
I certainly have nothing against a religious organization enforcing its rules of conduct on its employees.
What about non-religious organizations? (Forget current legislation). As a private businessman who pays the mortgage, taxes, etc. etc. etc. on MY OWN BUSINESS, do I not have the right to say who I want to hire? Or is "choice" only valid when it comes to murdering the unborn?
You totally should. I never bought this BS about having 2+ job candidates who are "equally qualified" for a given job. You should not be forced to hire someone who is not qualified for a given job based solely on factors that have nothing to do with job performance.
As an aside though, I think the rules your rightfully criticize are only enforced on businesses where the owner or owners are mostly straight whitey ostensibly-Christian males. I don't think I've seen many, or even any, such complaints lodged against other businesses.
You can even extend the "job performance" rule to religious organizations. Most churches have employment rules for clergy that extend deep into the outside-of-church lives of these people. I see nothing wrong with such rules being imposed on any given employee if that's how the religious organization wants to do things.
You ask some very good questions, and I think these are the sorts of questions about the nature of the relationship between individuals and the state that Rand Paul was asking, before he was attacked for daring to raise such questions.