A anti Islam activist from NSW. Callaghan is an active anti mosque campaigner, formally running an anti Islam watchdog website Islamic Monitor. He went on to become a founding member of the shadowy anti Muslim organisation Q Society. He served as the group’s secretary in 2013 and remains a board member.
Callaghan was the founder, chairman and coordinator of the Marulan Residents Action Group which in 2015 planned to organise a series of far fetched protests against the development of a mosque in the area.
Callaghan was one of the Q Society’s leading figures involved in a defamation case on account of their endorsement of several slanderous anti Halal campaigns which is currently in court.