Why does a company enforce religious rules anyway? IMO, companies should stay out of this unless 99% of their employees actually follow a single religion. And even then, it'd be much more sensible to let the employee him/herself decide how closely to follow the religious rules.
This is exactly what's causing all those integration problems. Specifically Jewish rules are enforced in all sorts of places in Israel. In most cases, this does nothing but antagonize non-Jews. I imagine that even Jews who don't particularly care about religion wouldn't be too fond of having someone shove these (in many cases pretty stupid) rules down their throat.