Blackwater trained ISIL militant Colonel Khalimov - Why?

Being over 50, I have lived through interesting realities of American history like Reagan / Bush selling arms to Iran (thereby supporting both sides of the Iran/Iraq conflict) and diverting the proceeds to support the "contras" war against the democratically elected Sandinista government in Nicaragua. Or the revelations of the Church commission, of the news media being stocked with CIA agents for the purpose of shaping public opinion. Or the proud admission by Kissinger (on edit: Brzezinski) that he helped organize al Qaeda for the purpose of weakening the Soviet Union (his finest or proudest hour, I can't remember which he called it). Or the ugly connections between the "School of the Americans" training of Latin American paramilitaries in torture and fear tactics to the eventual implementation of those techniques on nuns and community organizers and political activists on the left in the subsequent years. Or.. Well, you get the idea.

So when I hear our government confirm that Blackwater gave extensive special forces training to a man that is now an ISIL commander, General Khalimov, I think "That's interesting. Wonder what the real story is?"

http://readersupportednews.org/news-section2/318-66/30475-us-state-department-confirms-they-sponsored-training-of-isil-militant

Did Khalimov wake up one day and, of his own volition, decide to defect to the other side of the "fight against terror"? Or is the story more complicated? I wouldn't lay money on any one theory, because they all seems somewhat plausible...

Interesting: http://fortressamerica.gawker.com/meet-the-elite-u-s-trained-special-forces-chief-who-ju-1707536367

..OMON, Khalimov’s SWAT-style special forces unit in Tajikistan, received millions of dollars annually from “Defense Department counterterrorism and counterdrug programs” for training and equipment, including “bullet-proof vests, special helmets, masks, binoculars,” and weapons. The U.S. ambassador to Tajikistan in 2013 proudly boasted “that Tajik OMON officers took training in the United States last year and showed high professionalism.”