I am sorry but I take issue with the notion that the 'N' word has become 'grossly offensive'. So when did that change? Probably about the same time that the 'F' word became acceptable to use in public. I still find the 'F' word offensive, probably harking back when I my derriere thumped for using it.
The word was enshrined in the common law for many years as its use would invite a charge of offensive language - despite the use of it double-barrelled by our American cousins invoking one's maternal parent. Same with the 'C' word - a derogatory term that could otherwise be described by its proper definition.
So this concept of 'offensive' is purely manufactured. I say become an engineer (you know, build a bridge and get over it). I shall retire now to eat my pork pie in the local synagogue.