Someone should ask the question: “Why did our government and the English support Tito the communist?
Communist moles within their respective intelligence agencies, the OSS was fraught with them.
The head of the Yugoslav Desk during WWII was a man named James Klugman, a well-known British communist. Klugman altered the Yugoslav reports coming in to HQ to favor Tito and disparage Mihailovic. The American pilots were witness to some battles that they knew Mihailovic had fought, but later that evening they'd hear the BBC report that it was Tito's action, not Mihailovic's. That was repeated over and over. Moreover, all attempts to get the American pilots out of Yugoslavia that tried to go through Klugman's British Yugoslav desk, kept going wrong. That's why the OSS had to go in directly rather than to rely on the British to help with the rescue.
Klugman had also been the communist recruiter at Cambridge who had recruited Kim Philby, Anthony Blunt, Donald McClean and the rest of the so-called Cambridge Spy Set, which was a huge scandal in Britain many years later.