Unlike Peter Brimelow, I never met Jack Kemp. Once upon a time I thought positively of him, because he was a big Ronald Reagan supporter and he advocated for a “flat tax,” which is a pretty good idea if it could be implemented correctly. (It must be pointed out that a “flat tax” means different things to different people.)
But in retrospect, I don’t think that Jack Kemp was really one of the good guys. He was a paleo-conservative HBD-denialist with disturbing paleo-libertarian tendencies (as evidenced by his support for the gold standard). Just as liberals believe they can fix the black-white achievement gap through liberal policies such as Head Start and other spending programs, Jack Kemp believed he could fix the black-white achievement gap through conservative policies, like making NAMs take more personal responsibility. For example, he believed that if poor people owned their own home, then they would suddenly take pride in ownership and become good capitalists instead of underclass poor people.
Because Jack Kemp was an HBD-denialist, he was pro-immigration, both to demonstrate how non-racist he was and because in his narrow libertarian view of the world, all government restrictions, including restrictions on who's allowed to move here and work here, are evil and do harm to the economy.
I see Jack Kemp’s influence behind a lot of other conservative HBD-denialist initiatives, such as No Child Left Behind, Bush’s illegal immigrant amnesty initiative, the belief that we could turn Iraq into a capitalist democracy just like the United States, and of course, the housing bubble and its collapse which was directly inspired by Jack Kemp’s assertions that home ownership for everyone would make the country a better place.
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It's easier for religious Christians like Jack Kemp to deny HBD because they don't believe in evolution, so they don't have to explain why intelligence stopped evolving 50,000 to 100,000 years ago when the races split up. They can just believe that God created us with equal intelligence.