He is president of the Supervisory Board of the Honorary Bleiburg Platoon, an organisation which is the main organizer of the commemoration for Bleiburg repatriations, and associate of various initiatives for the determination of victims of communism. The subject of his interest is the relation of modern Croatian nationalist ideology, in particular the Party of Rights and its present-day offshoots, Islam in Croatia and Islam in Bosnia and Herzegovina during the 19th and 20th centuries. Hasanbegović researched the Muslim component of Croatian bourgeois culture until 1945 and the political and ethno-religious relations in Bosnia and Herzegovina since the 1878 Austro-Hungarian rule until the communist takeover in the 1940s.