Australia's day for secrets, flags and cowards

On 26 January, one of the saddest days in human history will be celebrated in Australia. It will be "a day for families", say the newspapers owned by Rupert Murdoch. Flags will be dispensed at street corners and displayed on funny hats. People will say incessantly how proud they are.

For many, there is relief and gratitude. In my lifetime, non-indigenous Australia has changed from an Anglo-Irish society to one of the most ethnically diverse on earth. Those we used to call "New Australians" often choose 26 January, "Australia Day", to be sworn in as citizens. The ceremonies can be touching. Watch the faces from the Middle East and understand why they clench their new flag.

It was sunrise on 26 January so many years ago when I stood with Indigenous and non Indigenous Australians and threw wreaths into Sydney Harbour. We had climbed down to one of the perfect sandy coves where others had stood as silhouettes, watching as the ships of Britain's "First Fleet" dropped anchor on 26 January, 1788. This was the moment the only island continent on earth was taken from its inhabitants; the euphemism was "settled". It was, wrote Henry Reynolds, one of few honest Australian historians, one of the greatest land grabs in world history. He described the slaughter that followed as "a whispering in our hearts".

The original Australians are the oldest human presence. To the European invaders, they did not exist because their continent had been declared terra nullius: empty land. To justify this fiction, mass murder was ordained. In 1838, the Sydney Monitor reported: "It was resolved to exterminate the whole race of blacks in that quarter." This referred to the Darug people who lived along the great Hawkesbury River not far from Sydney. With remarkable ingenuity and without guns, they fought an epic resistance that remains almost a national secret. In a land littered with cenotaphs honouring Australia's settler dead in mostly imperial wars, not one stands for those warriors who fought and fell defending Australia.

This truth has no place in the Australian consciousness. Among settler nations with indigenous populations, apart from a facile "apology" in 2008, only Australia has refused to come to terms with the shame of its colonial past. A Hollywood film, Soldier Blue, in 1970 famously inverted racial stereotypes and gave Americans a glimpse of the genocide in their own mythical "settlement". Almost half a century later, it is fair to say an equivalent film would never be made in Australia.

In 2014, when my own film, Utopia, which told the story of the Australian genocide, sought a local distributor, I was advised by a luminary in the business: "No way I could distribute this. The audiences wouldn't accept it."

He was wrong - up to a point. When Utopia opened in Sydney a few days before 26 January, under the stars on vacant land in an Indigenous inner-city area known as The Block, more than 4,000 people came, the majority non-Indigenous. Many had travelled from right across the continent. Indigenous leaders who had appeared in the film stood in front of the screen and spoke in "language": their own. Nothing like it had happened before. Yet, there was no press. For the wider community, it did not happen. Australia is a murdochracy, dominated by the ethos of a man who swapped his nationality for the Fox Network in the US.

The star Indigenous AFL footballer Adam Goodes wrote movingly to the Sydney Morning Herald demanding that "the silence is broken". "Imagine," he wrote, "watching a film that tells the truth about the terrible injustices committed against your people, a film that reveals how Europeans, and the governments that have run our country, have raped, killed and stolen from your people for their own benefit.

"Now imagine how it feels when the people who benefited most from those rapes, those killings and that theft - the people in whose name the oppression was done - turn away in disgust when someone seeks to expose it."

Goodes himself had already broken a silence when he stood against racist abuse thrown at him and other Indigenous sportspeople. This courageous, talented man retired from football last year as if under a cloud - with, wrote one commentator, "the sporting nation divided about him". In Australia, it is respectable to be "divided" on opposing racism.

On Australia Day 2016 - Indigenous people prefer Invasion Day or Survival Day - there will be no acknowledgement that Australia's uniqueness is its first people, along with an ingrained colonial mentality that ought to be an abiding embarrassment in an independent nation. This mentality is expressed in a variety of ways, from unrelenting political grovelling at the knee of a rapacious United States to an almost casual contempt for Indigenous Australians, an echo of "kaffir"-abusing South Africans.

Apartheid runs through Australian society. Within a short flight from Sydney, Indigenous people live the shortest of lives. Men are often dead before they reach 45. They die from Dickensian diseases, such as rheumatic heart disease. Children go blind from trachoma, and deaf from otitis media, diseases of poverty. A doctor told me, "I wanted to give a patient an anti-inflammatory for an infection that would have been preventable if living conditions were better, but I couldn't treat her because she didn't have enough food to eat and couldn't ingest the tablets. I feel sometimes as if I'm dealing with similar conditions as the English working class of the beginning of the industrial revolution."