He explains in writing right here, and was generous to let me see the pre-publication text and quote from it:
By the time the whole thing was finished I had a lot more sympathy for the protagonist of Franz Kafka’s novel The Trial, and a much sharper understanding of the term Kafkaesque: “Marked by surreal distortion.” On reflection I’ve concluded that it pretty much didn’t matter what I said on the stand, nor what any of the other expert witnesses on either side said. The outcome of the case was decided long before the trial began. It was decided when the hoopla started, when the media cast the whole affair in terms of stereotypical heroes and villains, and when the judge consulted old Hollywood films for better perspective. A courtroom is no place to discuss intellectual issues.
Behe, Michael J. A Mousetrap for Darwin . Discovery Institute Press, in press.