Earlier quoted context omitted.
I'm not an American, but I believe they are referring to the racist meme that associates fried chicken to Americans of non-white ethnicities. This differs from the UK where fried chicken is more associated with the lower classes than a particular race.
I've never really understood the nature of this stereotype - who doesn't at least like fried chicken? It's like saying, 'You know the Mexicans, they just love ice cream.' Of course they do, it's ice cream.
If you paint a swastika on a synagogue people will be upset, but not because they dislike shapes with 90 degree angles. If you say that black people love fried chicken people will be upset, but not because liking fried is unique to black people or inherently bad. It's mostly because it's a stereotype associated with a period in US history when it was socially acceptable for a white mob to lynch a black man for being rude.