This will be an interesting investigation. Firstly, the f-word may draw some attention but I tend to disagree. It is fairly common and generally regarded in legal circles (in Australia at least) as colloquial. Court cases have found that if you call a politician or police officer an f-something, you seem to no longer be guilty of offensive language.
In regards the Paki comment, it is my understanding that it is deemed racist in the UK but I am not sure where else. In Australia, if I sledged someone "you Paki", I would probably get a confused look as they are likely to be Indian or Sri Lankan. There are certain words to describe people, from what we refer to the sub-continent, that are deemed racist but I shall not mention them here. But it refers to their perceived diet.
We have television commercials that call the English "Poms" and the New Zealanders "Kiwis". It is my understanding that Pom tends to be a derogative description whereas Kiwi is not. Where does racism start or stop. Color, religion - Yes. Country of origin??? Not where I am from. You can call me an Aussie, a skip, a convict, whatever, no effect. You decide.
I'll wait and see the rest of the quote.
Cheers