...the training camps in Afghanistan... had been set up with the support of the CIA.

I don't think that fact implicates any U.S. agencies in a conspiracy. It just highlights the "the enemy of my enemy must be my friend" mentality that has pervaded U.S. foreign policy for years. We supported the Mujahadeen because The Soviet Union (aka "The Evil Empire") had invaded Afghanistan. We supported Saddam's Iraq because Iran had kidnapped our diplomats and thus placed itself in position #1 on our shitlist. Then we turned around and sold arms to Iran because they gave the diplomats back and raising money to fund "freedom fighters" was more important that keeping Iran high on the shitlist.

It would seem to me that after 50+ years of adhering to a policy of backing the perceived lesser of two evils and then seeing that lesser evil turn around and bit us on the ass, somebody would figure out that sometimes the only smart thing to do is stay out of other people's business.