No, you are not. You are concentrating on the historical facts of Nelson Mandela, not the "Effect". The Mandela Effect is just a name given to the phenomena where many people have a shared memory of various false events in history. The history of Nelson Mandela is just one of many things people recall differently. It sounds like you are getting offended by the OP's posts, which I am sure that was not the OP's intent. If the given name of the phenomena offends you, just think of it as "Berenstain Effect", "The Gump Effect", or "Froot Loop Effect".