Wasn't he a terrorist involved in bombings for the ANC
I suppose now we'll suffer endless tributes about him being a freedom fighter against apartheid.
It's all a matter of perspective... Apartheid was hardly ethical 
My best man was a South African classed as coloured because his father was Italian and his mum was Philippino, sort of a grey area between blacks and whites. When he was at university in England he protested outside the South African embassy in Trafalgar square, later to receive a letter from his government stating that he could not return for critising apartheid. So his family moved to the UK, the ban was later revoked.
He was more against the ANC gaining power than the inhuman apartheid situation, and was concerned about what would happen to a great country if power reverted to the indigenous population, like Rhodesia he wasn't wrong.
All a matter of perspective as you say, one mans terrorist is another mans freedom fighter. Adams and McGuiness are a case in point.
I for one will not mourn his passing, just look at the rabble that followed him and what will now happen without his influence