Complex sentence: The details of Brooks's own conservative politics have been clouded by her friendship with D'Annunzio, and admiration of him as an artist and fellow sufferer, there is no evidence that she was a card-carrying Fascist or even that she was sympathetic to Italian Fascism.
Split into simpler sentences: The details of Brooks's own conservative politics have been clouded by her friendship with D'Annunzio, and admiration of him as an artist and fellow sufferer. There is no evidence that she was a card-carrying Fascist or that she was sympathetic to Italian Fascism.