Try another option.

Although some workers may find it acceptable to be 'labelled' on the basis of their race, Mick feels offended and has asked Greg to stop making these comments.

Mick has the right not to be harassed.

This answer is partly true. Try another option for what constitutes harassment.

From the clip it appears he is offended. If so, Mick's right to work in a harassment-free workplace have been infringed.

The emotional effects of people's behaviours at work do determine if harassment has occured, particularly if it would be reasonable to feel offended under the circumstances.

Good answer.

Greg's behaviours give the best indication that Mick has rights.

There are many examples of unfair comments made at work - however, not all behaviours are covered by anti-discrimination laws.

But Greg's comments cross the line because they are about Mick's race or nationality.

This is an appropriate answer if Mick finds those comments unwelcome and they offend him.