Mugabe has never been completely sane, let's not even pretend there. The irony here is that the powers he preaches against actually helped install him.
What the Zimbabwe situation has highlighted though is the frivolity of the African Union and the corruption and stick-together-like-shit-to-a-shoe mentality of African countries - even those like South Africa and Ghana. None of these countries will act or properly denounce Mugabe; regardless of the regional instability which is resulting from the hundreds of thousands of refugees and the human rights abuses within Africa.
So yes, we can sit at our computers and say; 'bad, BAD Mugabe!' We can even shake our heads in disgrace... but we can't forget the bigger picture. No one has, loudly enough, called for action in Zimbabwe and the African Union have sat on their asses for years and allowed these atrocities to occur. Why? Because many other African countries are themselves corrupt and run by dictators, too scared for fear of the repercussions on their own state. It's time the African situation was addressed properly and with a new determination; unfortunately America has its hands full and grow war-weary and there is no other world power with the morals to act in the face of such evil.
Let's not forget that Zimbabwe has been making the papers for years and years - this isn't a recent occurrence. It's just getting progressively worse and reached an all new-height since the fraudulent elections which took place.