My thoughts are that it is a cover up about how the FBI was precluded from interacting with the CIA on domestic defense from terrorism. It was done to protect Jaime Gorelic (who was on the commission, too BTW) and who also later became a corporate officer at Fannie Mae (FNMA). She as second in command at DoJ was the primary perpetrator of instantiating the intelligence wall.
That’s it, 100%. No one wanted to call Slick Willie on the carpet for preventing this disaster, which he could have done without “the Wall.”