It's urban black culture that disparages intellect.
I'd be interested in your source for this particular tidbit, particularly how it shows blacks are any worse than whites in this regard.
I went to high school with a lot of tough white guys from South Boston and Charlestown in Boston, back when Whitey Bulger was still a big deal in Southie. Let me tell you most of them didn't see intellect as their path into the middle class. A few did, but not many. I've also worked with PhD scientists who were black and came from urban black neighborhoods. You get a mix of attitudes everywhere, whether it's in a black ghetto or white ghetto or a middle-class white neighborhood, but usually being academically advanced doesn't make you popular unless you live in town with a big Jewish population.
Speaking of Whitey, his people used to spread the myth that he kept drugs off the street in Southie. In fact he was kicking the Italian mob out of Southie so he could have the drug trade all to himself. Whitey wasn't a hero, he was a parasite. So why did people believe the lie? Wishful thinking. The people who got education and became professionals moved out of the neighborhood, so the one example of guys who rose in life that you saw every day were the mob. And you had to hope they were good lads at heart, because they had the neighborhood by the balls.
There's often a "we're all in this together" thing going on in poor, downtrodden neighborhoods. Part of that is a resentment of anyone who acts like their above the rest, and that includes people who flaunt their education or sophistication. But that's because intellectual accomplishments don't seem to be within the reach of everybody. You don't get that attitude in cultures which believe in self-improvement.
So let's *not* talk race. Let's talk education and economic opportunity. If people have a way up, see that way, and believe they can do it, they will rise.