Tupac once defined the word: He said a nigger is the one hanging on the rope, while the nigg(a) is the one with the gold ropes hanging at a club.

Also I think everybody hates when the white man say that word because, they enslaved us. I believe many people hang that over thier heads. Right now I have an Italian girlfriend and I myself are Afro American so my friends usually make jokes such as " Isaacs' gonna get 22 to life" or "you keep playing with her like that you going to jail" referring to how "Blacks" were falsely accused of rape by Caucasian women. So I don't believe its just the white man cant say the word, I believe its deep seeded un-forgiveness. Most of my friends still use the Black Power symbol even though were in highschool and did not even witness that generation, they have even debated that if white slavery happens would they enslave Hispanics.