Food for thought

I earlier read that as a social worker, one has to be understanding and keep an open mind about individuals that are part of social minorities. However, how understanding and accepting does one have to be about different cultural and societal norms. In particular, aspects that are patriarchal dominant in nature and approve if not encourage spousal abuse? For example, in some cultures women are seen as property and physical corrections are accepted as every day occurrences. Are we as future therapists suppose to tell them that their whole culture has it all wrong? What are we suppose to do or say?