Why Is It OK For Blacks To Use "The N Word", And Not Other Races?

In light of the Bill Maher situation, of using "The N Word", it has me thinking of why its such a big deal. David Banner also has a viral video out, speaking about why whites, or any other races can not use the "N word", even if it's not spoken in a derogatory context. This logic intrigues me. Why is it any different, if Blacks can use it as a term of endearment? Let's talk about it. Tune in from 9-11pm.