I will not comment about "white folks who don't know their own language" and how this phrase is not "politically correct." I do want to say though that people from different parts of the world are not called "minorities" only because there are less of them in a given population. They are also minorities, because it takes them extra work to, in some cases, merge with the majority and, in other cases, to "deal" with the majority. With that in mind, those people, in general, have many more things to worry about besides language. Although, one might argue that it was their choice to come to the US (not always true) and they must learn proper language skills if they want to go to a professional school, such people bring in a lot into the school and it overwhelms their "mediocre" language knowledge.