Immigration, Blacks, Crime

George Borjas blogs some striking data. Arnold Kling has a cow:

[Borjas] blogs his research showing that immigration increases black crime by reducing black wages. In other words, "The immigrants made me do it." I'm not surprised by the result, but I'd think the obvious solution (drug legalization aside) is harsher punishments for a few thousand murderers, not exile for millions of hard-working immigrants.