The use of the word - implies harassment.  Derogatory harassment.  Harassment: Websters.com  : to create an unpleasant or hostile situation for especially by uninvited and unwelcome verbal or physical conduct conduct.  SO, A WHITE PERSON USING RACIAL SLURS against a person  BECAUSE THEY ARE UNWELCOMED!!!!  Is harassment. Boom.  The word is not used in causal friendly conversation. not even by blacks 99.9% of the time.  So that means.  That by the time you hear the "n" word  You are ALREADY BEING HARASSED BY ANOTHER PERSON  Who is often a racist or racial supremacist, and they have let you know that THEY WANT YOU TO BE UNCOMFORTABLE and KNOW that you are being harassed because of an uncontrollable factor (your skin color) and that  THEY are harassing you and ARE NOT going to apologize, NOR back down, just like the bully in this video - THE FAT CHICK.  She HARASSED and INSULTED a man with RACIAL SLURS and was unrepentant and defiant about it.  What is a non-black persons answer to Harassment with no intent to repent? SOMETIMES, ITS VIOLENCE.  So it is for "black" people.  Lets NOT FORGET that this boy was RACIALLY HARASSED and INSULTED IN PUBLIC.  And what is the Victim's response when they are Racially harassed and insulted in public and dared to do anything about it?  Sometimes, its an Ass-Whuupin'  <mic drop>