The commission heard the officers followed the car for two minutes because they believed one of the women was not wearing a seatbelt.
"You have to be the most stupidest person I've met as the driver of a motor vehicle," one officer says to the 24-year-old woman behind the wheel as he approaches the car.
Video shows the officer threatening to put the passenger, an older woman, in prison after demanding the pair produce identification.
“We’re taking her back to jail anyway,” he can be heard saying in the video, after learning the older woman recently migrated to Australia.
He later tells his partner: “hop out of the car, whack the cuffs on her".
The officer can also be heard threatening to charge her: “Don’t argue with me, love, or you’ll be going in the back of the paddy wagon as an accessory to bloody murder".
He also accuses the two women of "telling fibs" when they become confused about their ages and year of birth.
Later, the officer says: "don’t take advantage of our system".
An investigation into the officers' conduct was launched after the 24-year-old driver made a formal complaint and said further offensive comments were made after the camera worn by the officers was switched off.
She told the commission she was also accused of having drugs in the car and the officers suggested she would have been "shot from behind" in Afghanistan if police there pulled her over under the same circumstances.
The LECC report said the main officer had used “intimidating and abusive language” and deliberately “bullied and frightened” the two women during the traffic stop.
The second officer was also found to have engaged in misconduct for making "baseless threats" to the women about being taken into custody or immigration detention, and had "sought to intimidate" by aggressively asking the driver what her religion was.
The LECC report recommended disciplinary action to be considered against both officers.
NSW Police declined to comment on the current employment status of the two senior constables.
"A formal response will be provided to the LECC in due course," a police spokeswoman said in a statement.
NSW opposition leader Jodi McKay said the officers let the police force down.
“This is not good enough," she said.
"We need to maintain the trust of the police within our multicultural communities, and frankly, behaviour like this undermines the good work done by police officers across NSW."
The Australian Federation of Islamic Councils said the incident "severely undermines public faith in the police service".
Muslim women already face significant intimidation and harassment in the community, President Rateb Jneid said.
"For them to face the same actions from police officers is extremely disappointing."