Earlier quoted context omitted.
> "Racial disharmony is illegal." Why? Why should racial disharmony be illegal? It sucks when people don't like you, maybe they have good reasons, maybe not - but legislating "harmony" just sounds wrong. Also, why are people allowed to loudly proclaim "white people are evil" loudly, and broadly, without issues - isn't that also racial disharmony?
Why? because Australia and NZ have large immigrant populations (in fact, are large immigrant populations) that contain many races. Racial disharmony causes huge problems, and creates the real possibility of violence, mayhem and bloodshed. As reasonable societies, these things are seen as bad and to be avoided. Consequently, actions that will create racial disharmony are illegal. You can hate on whoever you like, but…
Where do you draw the line? All of the items in this list (going from least inflammatory to most) could possibly be construed as causing "racial disharmony":
"We shouldn't give special benefits to [minority group] (eg. affirmative action)"
"[minority group] commit x% more crime than the rest of the population" (factual)
"I personally don't like [minority group]"
"We should enact legislation that specifically penalize [minority group]"
"I wish [minority group] would die/get hurt"
"We need to kill/hurt [minority group]"
"Let's go kill/hurt [minority group]"
For reference, the US criteria is somewhere between the last two (https://en.wikipedia.org/wiki/Clear_and_present_danger).