This was Fratianno's account of a conversation he had with Roselli. I take a lot of what Fratianno said with a grain of salt, especially his chest thumping about how scared Jews in LA were of Italians, but I don't think he had any reason to lie about Roselli and Accardo. I'm sure Roselli told him these things about Accardo.

edit: I think this was a wiretapped conversation between Fratianno and Roselli. So, yes, Roselli definitely said these things.