Have a look at the following BBC news article:
http://news.bbc.co.uk/2/hi/africa/7503135.stm Now consider this. South Africa had sanctions imposed (and rightly so) because a legally elected government was oppressing part of its population. Zimbabwe doesn't have sanctions imposed because an illegal government is oppressing all of its population?
This whole thing makes me sick and is a reminder of why I should stay as far from politics as I possibly can.