RowdyRawhide
Full House
the reason racial/ethnic/religious/orientation slurs are perceived as worse that something like "pig", for instance, is that they attempt to denigrate an individual or class of individuals on the basis of an immutable characteristic, a characteristic intrinsic to an individual over which the he/she has no control*. use of the term implies that the individual in question is inferior on the basis of a characteristic which he/she cannot change.
the reason the n-word itself is sometimes perceived as the most offensive of these types of slurs - at least in the US - is due to the awareness of the reprehensible history of the treatment of blacks in the US. speaking for myself, for someone to know the history and to still use the term is indicative of extreme callousness. the callousness exhibited rather than the word itself is what is offensive.
as for whether it is "more acceptable" based on the use of the term by black people themselves, i suppose that can be your judgment. many people will find that to be an ignorant position and will think less of you for it. i heard this dyanmic addressed recently in the context of the word "tranny". someone took offense at being told he couldn't say "tranny" anymore. another responded that he could say it all he wanted, but odds are he's going to end up hanging around exclusively with people who think it's acceptable to say "tranny". seems to me to be a pretty way to think about it.
*debatable as to religion, but in that context it is used the vast, vast majority of the time with relation to the religion in which one is born, not the one chosen by the individual
I understand the supposed increase in offensiveness of the words; ie your "ability" to choose to be degraded vs not. The underlying point is they are all disrespectful and to me they are just words therefore equally disrespectful. I used to be very prejudice,until I learned that one of my good friends was gay (fifteen years ago), needless to say he did not cease being my friend, and I went through some soul searching. If I told you I still didn't have some prejudices I would be lying, however they tend to be in other parts of my life other than racial/sexual, I'm pretty sure you are not human if you do not have some. According to some "civil rights" leaders "thug" is the new n*gg*r......making a person wonder why the word needs a replacement if it carries such weight