As much as I hate racists I have to say I dont think there really is a link. The study does say that it measures IQ, which measures intelligence in one very specific way, which is a flawed way to look at intelligence. Fact of the matter is intelligence comes in many different ways and forms for the brain. You have social intelligence, empathy, physical intelligence, memory, comprehension, and critical thinking skills. From what I remember, the IQ really doesnt cover all those areas and is more on the lines of "Do you think like the creator of this test?" which is sheer narcissism on the creator of the IQ test and nothing else.
That being said, racists are mean people, and mean people suck...so yea...
Like when you see someone who is Latino serving food at a restaurant and someone comes up and says "I will take dos tacos" and then turns to his friend and says "They only understand it if you say dos."
Yea, you are a prick, moving on.