Bryan Coleman.
Bryan Coleman was one of the leaders of the League for Brotherhood, in the early 1920s. Coleman stated that "the leaders of our dictatorship will not listen, so they must be done away with by any means we have."
Owen Galloway mentioned Coleman by name in the Galloway Speech as an example of a reformer who thought that North American society was immoral and would have to be remade. Galloway contrasts Coleman with the traditionalist Heirs of the Rebellion, who demand that Coleman and those who think like him leave the country.
Sobel's source for Bryan Coleman's statement is Farley Shaw's Voices of the Great Protest (New York, 1930).