@Dietrich Graf
If you've been on an army course that says the 'N' word isn't offensive to black people (unless you say it like Bernard Manning or whatever it is you're suggesting by 'how it sounds') and you're now quoting that here as being true then that's probably indicative of a great many problems endemic within the armed forces today.
I don't know whether you're in the Heer or the US/British Army stationed in Germany (judging from your location) but you're clearly a very ignorant person regardless.
That or a very wry comedian.