She was a fascist who supported Pinochet and apartheid. Along with Reagan, her fraudulent economic policies have reduced our standard of living.
"It's always reassuring to find you've made the right enemies." -- William J. Donovan
It's easy to sit in the comfort of your home and slander her, however she felt a debt to Chile which she honoured - whether it was convenient to her public status or not. That was her decision - not to run away or hide when Pinochet was in trouble.
Personally, I don't like what Pinochet stood for however his country helped us during a time of need and her support says something about her character.
Regarding apartheid, she opposed the sanctions - something I felt wrong but FW de Klerk, who was in a better place to judge and comment says she did not support apartheid - she simply opposed the sanctions.
As to her being a "fascist" - I think that has more to do with your political lean than facts on the ground.
“Circus dogs jump when the trainer cracks his whip,” but the really well-trained dog is the one that turns his somersault when there is no whip.”