America created the biggest and most dangerous terrorist organization—Al-Qaeda. Yes, America created Al-Qaeda. When the Russians invaded Afghanistan in the late 70s, Al-Qaeda emerged as an international Jihadi movement against the Soviets. It was funded directly by the Pakistanis and Saudis and indirectly by America, which channeled its military hardware and other logistics through the Pakistani Inter-Services Intelligence (ISI) Directorate. For more details, read this Wikipedia article.
America created the Taliban. Again yes, America created the Taliban. Ahmad Rashid, a widely acclaimed Pakistani intellectual, writes in his book, Taliban, that: “The Taliban originated when the CIA with ISI recruited radical Muslims from around the world to fight with the Afghan mujahadeen against the Soviet Union.” Ahmed Rashid also estimates that after 1982 more than 100,000 Muslims from dozens of countries received political or military training in the CIA-backed camps of Pakistan and Afghanistan. For more details, read this Wikipedia article about Taliban.
America sold arms to Iraq and urged it to use WMDs against civilians in Iran. During Iraq’s war with Iran, many American policymakers, arms suppliers and makers benefited immensely by selling large amounts of weaponry to Iraq. These weapons included chemical agents like cyanide. In addition, America also encouraged Iraq to use chemical weapons against Iranian civilians and helped Iraq develop its chemical weapons arsenal. For more details, read Iraq and Chemical Weapons: the US Connection by Daniel E Boles.
America helped Iran to start its nuclear program. During the Shah’s period, America signed two agreements–the Atoms for Peace Program and the U.S.-Iran Nuclear Cooperation Agreement–with Iran to urge it to start its nuclear program. These two pacts, which would help Iran build up to 20 nuclear reactors, brought the US corporations as much as $6 billion in profits. However, after the Iranian revolution of 1979, America stopped backing Iran and its nuclear program. Resultantly, the program remained suspended for some time. Today, however, Iran is still trying to pursue what it calls a peaceful nuclear program. For more details read this Wikipedia article and this report written from an Iranian perspective.
America is the only country to have used WMDs against civilians. Remember Hiroshima and Nagasaki? American bombs, Little Boy and Fat Man, killed 66 and 39,000 innocent civilians respectively. This Yale University website has a very good report.