(EN) Michael Cromartie (a cura di), A Conversation with Bruce Hoffman and Jeffrey Goldberg, in Religion, Culture and International Conflict: A Conversation, Rowman & Littlefield, 2005, p. 30, ISBN 978-0-7425-4473-4.
«I define terrorism as 'religious' when some liturgy, scripture, or clerical authority is involved in sanctioning the violent act. Now there are all sorts of groups around the world that use force and can be identified using religious terms but are not 'religious' in the sense that I am using the term. In Northern Ireland, for instance, Protestants and Catholics fight using terrorist (or as they say locally, 'paramilitary') tactics, but theological justifications play little or no role»