According to the Council of Europe report, diversity should not be perceived as a threat but as a source of enrichement, but it can only succeed it is based on social cohesion and human rights.
At the end of the activity report, the comitee for human rights gives some recommendations to the institutionnal actors of the EU, indicating how to conceive the relationship between human rights and multiculturalism, particularly concerning the wearing of religious symbols in public areas.
See : http//www.osce.org
Download at PDF format