A brutal system leads to brutal behaviour; not an excuse, but an acknowledgement that 1980s South Africa was in many ways in a state of near collapse - something which people would do well to remember when bemoaning the very many issues the country is facing today.
An infinitely larger number of black people died because of actions by the Umkhonto we Sizwe terrorists than by actions by the actual apartheid government. A pretty damning conclusion, and if 1980s South Africa was truly in a state of near collapse, this was one of the main reasons for it.