There is a large discrepancy between what educated laypeople believe about cognitive science and what experts actually know. Journalists are steeped in the lay wisdom, so they are repeatedly surprised when someone forthrightly discusses the real science of mental ability.
If that science happens to deal with group differences in average IQ, the journalists’ surprise turns into shock and disdain. Experts who speak publicly about IQ differences end up portrayed as weird contrarians at best, and peddlers of racist pseudoscience at worst.
I’m speaking from experience. My Harvard Ph.D. dissertation contains some scientifically unremarkable statements about ethnic differences in average IQ, including the IQ difference between Hispanics and non-Hispanic whites. For four years, the dissertation did what almost every other dissertation does — collected dust in the university library. But when it was unearthed in the midst of the immigration debate, I experienced the vilification firsthand.