I am completely, in opposition to your theories that flags and monuments to apartheid, or, to any other 'isms'  in past history, be destroyed.   You are continuing, to over-protect a population which, so far, has failed in achieving, any success of its own.  Witness the ANC.  And the crazy mad destruction of statues of Rhodes, etc.   Which simply, obliterate,  the history of the country.  How? Are we going to be reminded, of our history, if all symbols of that sometimes, hugely, destructive past, are destroyed.  Are you encouraging,  a repeat of all that same racism, corruption, this time in favour of the black population? 
If, you witnessed the walk of Pope Francis,  (Papa Fransi, as we call him),  at Dachau, near Munich, Germany, where the man walked alone, lost in grief and contemplation, of the awful past.  You would realise, that flags, monuments, are constant reminders,  please note,  of our past, and where we no longer wish to go.  Remove them, and repetition is inevitable.