SYDNEY — One of Australia's top television journalists has opened a bout of national soul-searching by quitting his show over the racist abuse he faces as an Indigenous man in the spotlight.

An award-winning journalist with the ABC, Stan Grant, said the national broadcaster had lodged a complaint with Twitter about the "relentless racial filth" he endured.

But he added that he saw the media itself "lie and distort my words" and depict him as "hate-filled" after he raised Britain's colonial persecution of Indigenous Australians during ABC's coverage of King Charles III's coronation.

"I pointed out that the crown represents the invasion and theft of our land," Grant said in an article published Friday on the ABC's website.

"Police wearing the seal of the crown took children from their families. Under the crown, our people were massacred."

His coronation commentary was heavily criticized as being one-sided and inappropriate by some conservative media.

Grant said he spoke out of love for Australia because he needed to tell the truth that Indigenous people still have the highest rates of imprisonment and poverty.

The 59-year-old announced he would walk away as a presenter after the next episode of ABC's Q+A current affairs discussion program on Monday.

Grant took his employer to task.

'Toxicity around race'

"I am writing this because no one at ABC, whose producers invited me onto their coronation coverage as a guest, has uttered one word of public support. Not one ABC executive has publicly refuted the lies written or spoken about me."

Prime Minister Anthony Albanese offered his support to Grant, telling journalists: "You can have respect for different views without engaging in vilification."

ABC news director Justin Stevens also issued a statement backing Grant, saying he had faced "grotesque racial abuse, including threats to his safety".

Other colleagues spoke out, too.

"There are no words adequate to express the horror we feel at this. Stan is brilliant and cherished," said Sarah Ferguson, presenter of ABC's flagship evening current affairs program, The 7.30 Report.

Osman Faruqi, the culture news editor for The Age and the Sydney Morning Herald, who previously worked at the ABC, said staffing at the national broadcaster was not representative of the cultural mix of Australia.

But the issue went further than the national broadcaster, he said in an opinion piece on Saturday.

"It's also bigger than the media. There is a toxicity around race that resides deep within this country, infecting all of our institutions -- the media, sport, arts, business, and politics," Faruqi said.

'I have had enough'

In his departure announcement, Grant said Indigenous people had learned to "tough it out".

But the stakes are now higher, he said, as the country prepares for a referendum this year on whether to give Indigenous people the constitutional right to be consulted about laws that affect them.

"There is a referendum on an Indigenous Voice in Parliament, and I am not alone in feeling judged. This is an Australian judgment on us. Such is politics," Grant wrote.

"But racism is a crime. Racism is violence. And I have had enough."