The UN's top official on the prevention of genocide says the question of identity and diversity continues to be of serious concern, even 22 years after the Genocide in Rwanda. In an exclusive interview with SABC News, the UN Secretary General's Special Advisor on the subject slammed what he pointed to as unacceptable rhetoric from nationalist leaders particularly in Europe and the United States seeking to exclude people from their countries on the basis of race, religion or ethnicity. He also took a swipe at the current Republican Presidential front-runner in the United States. Sherwin Bryce-Pease reports.