I just stumbled on a very interesting video made by UK journalist Matt Tabaccos, who interviewed Capetonians on Mandela's birthday on 18 July 2011 about Nelson Mandela.
Tabbacos is describing his motivation for the interviews and his core question "Who is Mandela?" as follows:
"Having been residing in South Africa for over a year as a journalist, I had often received mixed opinions from locals across the class and racial divide on his status as an icon for peace and unity in modern South Africa.
So I decided to hit the streets of Cape Town on International Mandela Day 2011 and ask locals "Who Is Mandela?"