Complex sentence: In the book, Hoffman referred to the American Empire as the "Pig Empire", saying that it was not immoral to steal from the "Pig Empire"; in fact, Hoffman wrote, it was immoral "not" to do so.
Split into simpler sentences: In the book, Hoffman referred to America as the "Pig Empire" and stated that it was not immoral to steal from it. In fact, Hoffman wrote, it was immoral "not" to do so.