Why praise Thatcher for being strong enough to stick to her principles although you disagree with them? Stalin or even Hitler comes to mind ...
She was a strong willed nasty person who caused and is still causing dreadful pain and suffering to mankind. Remember her what she was, a vicious, greedy woman whose son profited immensely from an arms deal she did with the Saudies. May she roast in Hell unless, of course, they've run out of coal!