The CIA were happy to supply hundreds of millions of dollars in arms to the mujahideen during the 1980s. The US chose to support Islamist insurgents in a proxy war against the Soviet Union and the Afghan people have paid the price for that decision ever since. Many of the American soldiers who died in the war in Afghanistan were killed with weapons that were bought and paid for by their own government. If you believe that the American invasion of Afghanistan was a humanitarian gesture, you have been given an extremely narrow understanding of history.

https://en.wikipedia.org/wiki/Operation_Cyclone