Casey Luskin misrepresents the law

Tim Sandefur at the Panda's Thumb explains how Casey Luskin, attorney at the Discovery Institute, misrepresents the 1982 U.S. Supreme Court case of Board of Education v. Pico.

Luskin's misrepresentations of biology can be blamed on incompetency, but as a lawyer, shouldn't he at least know the law? I don't see how his continued misrepresentations--and failure to correct them--can be blamed on anything but dishonesty.