David Frum has weighed in on this article as well.

He doesn’t disagree with the Heritage Foundation’s message, just the method that Richwine chose to deliver his beliefs:

Opinion: Controversial immigration report may be right

But it’s a basic rule of politics: If you can’t disprove the message, you try to discredit the messenger.

And one of Heritage’s messengers sure enough proved discreditable. While work on the Heritage study was led by that think tank’s welfare expert, Bob Rector, the heavy number-crunching was done by a recent Harvard Ph.D., Jason Richwine. Richwine believes in a racial hierarchy of intelligence, with Jews and East Asians at the top and blacks at the bottom.

Richwine has expressed that opinion in a number of places, including at a 2008 panel discussion at the American Enterprise Institute. I happened to be the moderator of that panel. I hadn’t met Richwine before, and this discussion was my first introduction to his work. Afterward, I asked him to come to my office for a talk. I told him then that he faced a choice: He could be a serious scholar of immigration — or he could play in the fever swamps, but not both. Obviously, he did not heed my advice. Shortly after, he left AEI to find employment at Heritage.
[…]
Maybe Richwine did his math wrong. If he did it wrong, it would remain wrong even if he spent his leisure hours rescuing orphans from burning buildings. Maybe he did his math right. Then it would remain right even if he moonlighted as Grand Imperial Wizard of the Ku Klux Klan.