why were two national anthems sung?

Two national anthems were sung to symbolize equality and respect between two racial groups, typically whites and blacks. Each anthem represented one group, and singing both together was a powerful gesture acknowledging their equal status and promoting unity. This practice was notably observed during events like Nelson Mandela's inauguration in South Africa, signifying the end of racial oppression and the beginning of equal rights for all citizens. It was an act to honor both communities equally and to advocate for harmony and mutual recognition despite their differences.