[sandisk5]

I'm no expert. Mandela cofounded https://en.wikipedia.org/wiki/Umkhonto_we_Sizwe

https://en.wikipedia.org/wiki/Umkhonto_we_Sizwe#Bombings has a list of atrocities committed by them. During most of them Mandela was in prison I believe. I don't know about his influence over the organization during that time or if he condemned these attacks, I'd guess he didn't but am happy to be proven wrong.

"five civilians were killed and 40 were injured when MK cadre Andrew Sibusiso Zondo detonated an explosive in a rubbish bin at a shopping centre shortly before Christmas."

"a bomb was detonated in a bar, killing three civilians and injuring 69"

" terror campaign continued with attacks on a series of soft targets, including a bank in Roodepoort in 1988, in which four civilians were killed and 18 injured. Also in 1988, a bomb outside a magistrate's court killed three. At the Ellis Park rugby stadium in Johannesburg, a car bomb killed two and injured 37 civilians. A multitude[14] of bombs at restaurants and fast food outlets, including Wimpy Bars,[15] and supermarkets occurred during the late 1980s, killing and wounding many people."