Student requires views

As a S.W student my final placement is at an IFA. This area of work is new to me. However, I need to complete an assignment on law & evidence based practice. I want to do this around issues of 'matching' and religious and cultural belief. As a new Christian myself I am aware that faith is not just about Sunday's but about how I live my life. It seems that foster carers are expected to put these beliefs to one side in an attempt to be all things to all people and meet the needs of children who are from a religious/cultural background different to their own? Does this mean denying your own faith/belief? Should a greater emphasis be placed on matching? What research is available? Any other (polite) thoughts and views?