As I expected this "debate" was reduced to inanities going as far as Shaka and even the Catalan flag ffs...

The old flag is a symbol of the old apartheid government and the racists who elected it. It has no place in a public space today. Clearly.

Getting rid of "colonial trappings" is a quite a different kettle of fish though, and though it sounds good to end the story with, may not be so easy in practise.