'convicted' by a racist, apartheid regime, "
for being a member of an illegal organisation that murdered many people.


As a total aside I had an 18th floor flat in the gardens area of Capetown for a couple of years, back in the 70's. The view from the window was straight over Capetown and the bay towards Robben Island.

Now for a few inconvenient facts:
Mandela was arrested on 5th August 1962 and accused of plotting to overthrow the government. In 1964, at the age of 46, he was given a life sentence.

Umkhonto we Sizwewe, meaning ("Spear of the Nation") was the armed wing of the African National Congress (ANC), co-founded by Nelson Mandela in the wake of the Sharpeville massacre. Its mission was to fight against the South African government.

South African police statistics indicate that, in the period 1976 to 1986, approximately 130 people were killed by guerrillas. Of these, about thirty were members of various security forces and one hundred were civilians. Of the civilians, 40 were white and 60 black,
There was a bombing campaign, landmine campaign, the use of torture and executions.

All a matter of public record.
https://en.wikipedia.org/wiki/Umkhonto_we_Sizwe
https://omalley.nelsonmandela.org/omalley/index.php/site/q/03lv02424/04lv02730/05lv02918/06lv02938.htm