Here is a list of just some of the worst dictators the US has supported:
Abacha, General Sani - Nigeria
Amin, Idi - Uganda
Banzer, Colonel Hugo - Bolivia
Batista, Fulgencio - Cuba
Bolkiah, Sir Hassanal - Brunei
Botha, P.W. - South Africa
Branco, General Humberto - Brazil
Cedras, Raoul - Haiti
Cerezo, Vinicio - Guatemala
Chiang Kai-Shek - Taiwan
Cordova, Roberto Suazo - Honduras
Christiani, Alfredo - El Salvador
Diem, Ngo Dihn - Vietnam
Doe, General Samuel - Liberia
Duvalier, Francois - Haiti
Duvalier, Jean Claude - Haiti
Fahd bin'Abdul-'Aziz, King - Saudi Arabia
Franco, General Francisco - Spain
Hitler, Adolf - Germany
Hassan II - Morocco
Marcos, Ferdinand - Philippines
Martinez, General Maximiliano - El Salvador
Mobutu Sese Seko - Zaire
Noriega, General Manuel - Panama
Ozal, Turgut - Turkey
Pahlevi, Shah Mohammed Reza - Iran
Papadopoulos, George - Greece
Park Chung Hee - South Korea
Pinochet, General Augusto - Chile
Pol Pot - Cambodia
Rabuka, General Sitiveni - Fiji
Montt, General Efrain Rios - Guatemala
Salassie, Halie - Ethiopia
Salazar, Antonio de Oliveira - Portugal
Somoza, Anastasio Jr. - Nicaragua
Somoza, Anastasio, Sr. - Nicaragua
Smith, Ian - Rhodesia
Stroessner, Alfredo - Paraguay
Suharto, General - Indonesia
Trujillo, Rafael Leonidas - Dominican Republic
Videla, General Jorge Rafael - Argentina
Zia Ul-Haq, Mohammed - Pakistan
Do you really think the US would support so many dictators in the third world if it didn't believe that was in their best interest? We don't want these people thinking for themselves whether they be radical extremists or not.