The ABC chairman, Justin Milne, vehemently opposed moving the Hottest 100 away from Australia Day and tried to convince the ABC board to reverse the Triple J decision, saying “Malcolm [Turnbull] will go ballistic”, Guardian Australia has been told.

Multiple sources have said that the former managing director Michelle Guthrie supported the Triple J decision, which was taken after a year’s consultation, and convinced the board not to bow to pressure from the government.

There was huge pressure on the ABC because the communications minister, Mitch Fifield, had asked the ABC board to reconsider the decision to move the Triple J Hottest 100 from Australia Day because it was “making a political statement” by taking an action that would “help to delegitimise Australia Day”.

Milne was also opposed to Guthrie’s handling of the ABC’s Tonightly sketch in which they used the word “cunt” when highlighting the racist past of the grazier John Batman.

In a skit aired in March, a candidate for Cory Bernardi’s Australian Conservatives party, Kevin Bailey, was lampooned about the name of the electorate of Batman.

Milne was furious and adamant that Tonightly presenter Tom Ballard should immediately apologise for the sketch on the program, but Guthrie insisted that the ABC’s internal complaints process run its due course.

The ABC’s internal complaints unit and the Australian Communications and Media Authority cleared the Tonightly sketch.

“Michelle was always saying we should back our artists and staff but Justin was always interfering and saying this will annoy the government,” a source close to the board said.

“Michelle stood up to Milne when he tried to interfere with management decisions. He believe Emma Alberici should be sacked and the top 100 should not be moved.”

Fifield said he has raised factual errors made by the ABC but he has “always respected the legislated operational and editorial independence of the ABC”.

“I have never involved myself in staffing matters, nor am I aware of any member of the government who has sought to do so,” Fifield said on Wednesday.

“The operations of the ABC are entirely matters for the board and management of the ABC which, by law, the minister does not have a role in.”

“Questions about the ABC’s board and management are matters for the ABC.”