Nelson Mandela was 'convicted' by a racist, apartheid regime, and the conviction was and is invalid as far as any decent, right-thinking human being is concerned. You would probably have felt very comfortable there.

Purely anecdotal but my half brother lived there for decades around that time, loved having the servants and such like but left when apartheid ended, complaining about how badly he has been treated ever since.

I am sure it is entirely coincidental but he is the arch-Brexiteer of the family.

It is safe to say we don't see eye to eye on many things.