Well, in my case, that situation would never arise (see previous comments). But, if I were the boss, I would advise the employee to either do that on their own

Well, in my case, that situation would never arise (see previous comments). But, if I were the boss, I would advise the employee to either do that on their own time, or seek other employment. Again, I believe strongly that a work environment is not the place for personal politics or religion, unless that is the purpose of the business (the one concession I’ll make).