https://en.wikipedia.org/wiki/UMkhonto_we_Sizwe#1980s:_Bombi...
That's not a justification of apartheid, though. One can argue that apartheid and terrorism are both morally despicable. Or one may argue that terrorism is sometimes justifiable.
And there are many other historical examples of the same. E.g. Soviet partisans did a lot of things that would also be considered terrorism during WW2 - targeting not Germans or their pet militias, but civilians accused of collaboratinism (which could be very vaguely defined - e.g. teachers who refused to close down schools on occupied territories). Again, you could debate whether it was justified or not, especially in the context of much broader use of terrorist tactics by Germans themselves, but that's a separate conversation.
https://en.wikipedia.org/wiki/South_African_Council_of_Churc...
Unfortunately the answer is something like "yes but we don't want to speak about that because it makes us feel uncomfortable" most of the time. Thing is western society has been doing well the past 20/30 years regarding civil-war like violence at a large scale and for a hard to fix issue, and no one wants to talk about how or why but everyone wants to believe days of violent civil uprising are long gone.
What's stupid is thinking that on a violent conflict only one side can be guilty of terrorism.
If you are saying that the ANCs actions make them objectively terrorists, I would say that I've never seen the term terrorist used in an objective and consistent manner.
Why is the same charge not levied against the apartheid South African state, which refused to renounce violence after committing violence against its own black citizens (forcible imprisonment, beatings, etc.) for daring to marry a white person, against anyone who was caught in a white area of the country, etc. etc.?
Were violent European revolutions against their monarchs all terroristic?
Honestly surprised to see so many apartheid apologists in these replies.