Well, Sunny is just another person that's pointed out and made use of an unfortunate truth in the entertainment industry, one that wasn't always there: you no longer have to have talent to be famous and to make a big paycheck, you simply have to be willing to make an utter disgrace of yourself in some manner of public forum.
While Paris Hilton may not have been the originator, she's the first one that I recall who became famous not just because of her family's wealth, but also because she was more than willing to throw any sort of personal integrity out the window in order to achieve her ends. Remember years back about how the sex tape of her came out and she made this big fuss over it? I may be wrong and this may sound like a conspiracy theory, but I'm of the opinion that the tape wasn't "stolen" but that it was strategically meant to come out as Hilton's reality show was about to hit the airwaves. Factor in the various reality show stars or internet celebrities that were willing to also make idiots of themselves for their 15 minutes and you have a new entertainment medium in which no talent, skill or sense of self respect is required for you to become famous.
I don't know if Sunny's comments were meant to be malicious or not, but I do think they were intentional. Here we are in the year 2016 and we've seen a number of extremely high profile incidents the past few years that've jacked racial tensions up to heights they haven't been in many years; in spite of all that, this blonde white woman uses the racial slur of all racial slurs and she had to know that it'd cause some sort of controversy. After all, the debate on whether it's "acceptable" for white people to use the word around friends or family members who're racial minorities, and said people are okay with it, is one of the most heatedly debated topics regarding race relations.
The old adage "there's no such thing as bad publicity" is sort of the truth because no matter what, there's always some sort of angle that can be milked for some degree of material gain.