Suong Nguyen was "scared" of a woman wearing a niqab when she banged on her car door, told her to take off her mask, and called her a terrorist.

The victim, Semaa Abdulwali, filmed the racist attack in the car park at Macquarie University on January 20, and the footage was watched by millions of people when her husband Ramzy Alamudi posted it online.

Nguyen was on Monday handed good behaviour bonds and a fine, after pleading guilty to intimidation and causing damage.

Magistrate Suzanne Seagrave said Nguyen displayed an "unexplainable prejudice that has no place whatsoever in our multicultural society".