Apart from his musical activities, Michelangeli was a qualified doctor and pilot, racing car driver, and member of the Fascist resistance during the Second World War.
I wouldn't be surprised if some people didn't want to play together with him for example. Didn't Von Karajan have the same problem? Because he joined the German Nationalistic and Fasistic people some people didn't want to play together with him. For example, Isaac Stern refused to play with Von Karajan. Anyone know whether Michelangeli had the same problem?