The Tito/Mihailovic Yugoslavia mess involved the Cairo office at the time Penrose was there. There was a secret campaign that would reverse US policy and communication could not go through Bari, Italy.
I did see where there is a claim by an author that Tito took Mufti off the War Criminals list.
There is information in the national archives referencing claims that Mufti is the one that game up with the plan for Nazi’s to exterminate the Jews.
“In 1946 American state secretary Dean Acheson announced the planned publication of a White Paper based on al-Husaini’s files which had been seized from Germany. But for fear of offending Muslim sensibilities and other political considerations it never appeared. A few days later al-Husaini claimed that among his American captured records were fakes, that the Zionists forged them.”