Kaz wrote:

<snip>

I don't know what you have learnt in your schooling, but I have learnt 
this.

Question:  What is the negative effects of racist and sexist languages 
with respect to perception?

Answer:  Not only do they harm the person who was referred to, but also 
do they harm society.  Our culture value (I am not sure about Kaz's 
culture) and society are shaped by our language. Racist and sexist 
languages suggest that some people are less important than other people. 
The more languages are allowed to continue, the more stereotype and 
other inaccurate judgments are perpetuated.  You can not change cultural 
perception without changing language.  Language has to change;  language 
is responsible for how the culture shapes. (Bonnie)

I hope it helps you.  This is how they teach people to be international 
/intercultural rather than being American.  America (the USA) just 
happened to be a large land where many kinds of people happened to live.