Why?
Because he's a racist fuckwit.
This has been another edition of simple answers to simple questions.
...adding, this is at least the 5th time we've had a round of this horseshit since I started blogging. It always attracts numerous commenters who are dumber than dirt - even dumber than Saletan is presenting himself as - who do not understand the words they use but know the Very Deep Truth that black people are stupid. God it pisses me off that mainstream publications think ignorant racism is the hottest thing since the Spice girls, but kudos to all of them for their brave embrace of phrenology.