Lets make it interesting ... how about an employer running a wedding photography business, who has an employee who suddenly finds religion but who knew at the time of his hiring what he was getting into when signing his contract.
Can that employer fire him with cause? Maybe, maybe not ... depends on how courts will interpret "but not limited to".
For civil servants though things are a lot more clear cut ... have fun with civil servants turning orthodox jew refusing to do a ton of shit and working with women and becoming even more useless than your average civil servant.