Is there an even larger problem with Trainor's assertions?

In the article "The Emotioned Power of Racism: An Ethnographic Portrait of an All-White High School," Trainor argues that issues of racism in certain demographics, in particular all-white classrooms, seemingly develop in the benevolence of instruction.  She suggests a presence of "emotional dimensions" of racist ideas that do not have a basis in what we have traditionally deemed as the crux of a racist agenda: oppression and repression to put it mildly.  Trainor goes on to explain that it is this emotioned response, a certain devotion to principles, evoking or at least reducing the literary exploits of Maya Angelou as "whiny."  And since one of the overarching themes in this particular school is to remain "positive" at all times and to not waste energy on unfortunate but unavoidable situations like racism, it certainly makes sense that many white high school students dismissed Angelou's critique of the viciousness of racism.  Trainor points out these didactic approaches at the all-white high school quite effectively despite the small sample size.  But I see a larger problem.  If it is plausible that these students are permitted to harbor these racist ideas in the name of academic excellence, what is the likelihood of these didactic principles being adjusted?  For example, Trainor does well to identify that for the most part Laura Canyons is not only situated in a well to do community, but the students, for the most part, are going to college at "above average rates."  Who would have the audacity to tell white parents that they will be changing these "emotional dimensions" because of their link to racist attitudes?  I say no one.  And thus the problem would be identified but continue to exist, thus making identification of this problem nearly pointless.  Furthermore, the larger problem could be, in my estimation, an incubation of racist ideas just waiting for the appropriate racial conflict to balloon into a situation forever making the racist ideation a standard of racism to eternally adhere to.  It cannot be overlooked that the one high school student claiming "he doesn't even see Black people," speaks to not only the distance from people of color from a proximal standpoint but the distance also speaks to social, and cultural separation as well.  I think these two areas are even larger areas of concern in addition to the "emotioned response" Trainor contends is a function of academic ideas nourishing decreased sensitivity to racism.