system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 Why referring a pakistani 'paki' is a racial abuse? 

Aussie, Brit, Indian, African is all okay but 'paki' is so wrong. Why?
gpt
Slurs of any kind become wrong because of they way they are used. Once the word has been used in a hateful or derogatory manner enough times, the word itself can be used to imply hateful and derogatory things without them having to be explicitly mentioned. This makes the word itself offensive, and thus bad. Often, once it becomes taboo, the offensiveness creates a feedback cycle, making it worse and worse to use. 

In case you're a literal 5 year old: If you call someone a name in a mean way long enough, that name will remind them of the mean things that go along with it, and so they might have their feelings hurt if you call them that.