The worst of these Mandela Effect theories is the one about the concept's namesake, Nelson Mandela.
If you truly remember that Nelsen Mandela died in the 1980's you are a flaming racist idiot who probably thinks all Black people look the same. The 1980's was the peak of the Free Nelson Mandela movement. Only a board-certified cracker would think that he died before he was freed and became president of South Africa.