Way too many people avoid naming names when dealing with race, even in stories that directly cite "black." It's urban black culture that disparages intellect.
No, they are by far not the only ones to disparage intellect. Basically, anyone who is not intellectual, competes with intellectuals, or whose goals are opposed by intellectuals, are likely to disparage intellectuals because it is advantageous to them to do so (odds are, they do this without knowing the reason but rather because that is what their group does). In the case of people who are not intellectual, they have the further reason that they inherently devalue intellectual pursuits as demonstrated by their own choice (or resentment, if it was not their choice).
Just to give a racially biased example, Republicans tend to be rich, white, and to disparage intellectuals. Democrats will disparage intellectuals only on a case-by-case basis of those who's opinions or scientific results are "wrong", while being generally supportive of intellectuals. Groups such as a class where the bottom percentage would fail had the seemingly ironic quality of being extremely viscous and mocking of high achievers, while trying their hardest to be one. And all kinds of other groups of various races are disparaging of intellectuals.