In fact, we should probably stop using "ethnic" all together. It's otherising and dumb, especially when used to describe people. As for professing love for a food, it does seem like a perfectly nice thing to say. Korean people might like Korean food, but they also probably like a lot of other kinds of food too - just like anyone else. Learning a language and a culture takes effort and time - and maybe these people have other interests. This enthusiasm to relate on a cultural level can also lead to a "I know more about your culture than you do" area, which is bad news for all concerned.
Origins of the study This study began as a broader ethnography concerning the personal lives of black women in the academy, and initially focused on graduate students. Subjects were all members of a support group for black women at a large university in California. Interviews were conducted over a series of two years, during which several of the women graduated and moved away to accept positions of varying prestige. A portrait of the original group provided some discernable patterns of interest: While all of the members identified themselves as black, and specifically African American, nearly a third of the group had one white parent, usually a mother.