
Rubbish! Queen Maria José always hated Mussolini and his accolites. She appeared to be secretly involved with the Resistance, and she was also said to have taken part in a plot to kill Mussolini. I highly doubt Romano Mussolini could have ever written such a letter. He was a painter ( he exhibited his paintings in a nearby town here, and I had the chance to see him many a time, though I never talked to him. He seemed to be a gentle person), and a valued jazz pianist. Ironically his father prohibited the Italians from playing jazz or listening to it, because it was the music of the Black.
As far as I know he never showed any interest in politics.