Sir: The discussion of the nature of ideologies, contained in the article by Mark Durie (“The Eco-Fascist Ideology of the Christchurch Killer”, May 2019) made me think. It called to mind the times I have listened to the Aboriginal radio station 98.9FM in Brisbane, and its one-hour weekday program Let’s Talk. The station presents mostly advertisement-free country and western music, and I have enjoyed listening to it for years when driving; when Let’s Talk is on I usually continue listening. But many times over the years, on returning home, I have said to my wife, with good humour, that I have…