She didn't support Apartheid, she refused to embargo SA because of it. I recommend reading her memoirs where she illustrates just how tough a decision that was. Anyone could see at the time that the embargoes hurt the (mostly black) poor and did nothing to stop the rich white people doing what they were doing. Any embargo would have been an empty political statement - something we've got very used to in the last 16 years.
Good Points Scara. Also to add, She stripped the Miners of their dignity? I think they did that themselves by agreeing to what amounted to an illegal strike given the lack of a proper national ballot. For the way their lifestyles changed in that 12 months and forever after, they have Scargill to thank just as much if not more than Thatcher.
The Unions needed sorting out anyway, It caused mayhem in the 70s and she wasn't going to blindly let that happen again. Scargill and his cronies were too bloody minded to see that their actions were playing right into her hands.
Fact is that as a country in terms of domestic issues and on the wider world stage, we were left in a better place upon her departure than what she walked into whether you like it or not.