The US supported dictators for years - Saddam in Iraq as well as the Shah in Iran, Mubarek in Egypt, the Saudis in Saudi Arabia .......
What a sad joke the Americans keep repeating about fighting for freedom. They might still, but only if it coincides with their perceived geopolitical interests.
I have to agree with my bosom buddy anon_vlad, Rwanda is a classic example-
http://www.theguardian.com/world/2004/mar/31/usa.rwanda