Multiculturalism doesn't work insofar as a society needs a basic agreed upon set of principles upon which to base their legal system. However, it is not at all uncommon for differing cultures to be able to establish acceptable standards that work for both cultures. It's typically only when there are cultural aspects that one group feels are morally obligatory while another group finds such things morally objectionable. So, usually it is superstition based practices that ruin it. If cultures were acknowledged as the creations of mere mortal men instead of blessings bestowed upon us by the Lord I imagine things wouldn't be so difficult.
