For me, it's not the n-word at all. If Mr. Gibson had said, your dressing that way will get you raped by Puerto Ricans, I would still have just as low of an opinion of him. It's claiming that one ethnic or racial group is more likely to rape someone based on her style of dress that offends me.
Ye. It's offensive, and ment to be just that. Though my point was that we do or have in the past said a lot of offensive stuff in private, not necessarily from hate or convergent resentment against the given group et al, but from a place of spew aimed to hurt and disrespect. For me the word he used is secondary, I do not become offended by being people calling me pale-face or telling me white or scandinavian people are, globaly, comparetively born rapists. I would however, while not offended, be angry if this was simply icing on the cake and it turned out he had a tendency to physically abuse her. It has been reported, but not much ado has come out of it either way. In a sense it seems it isn't as juicy as what slurs the man might spout next.