First, what do you think Bush would want to hide about the war on terrorism - twelve years after he has left office? Sources and methods are protected indefinitely as things stood before Bush decided to make America a more secret country. [I agree with keeping sources and methods classified. I don't agree with keeping classified great mistakes, cowardly mistakes, outright treachery, blatant criminality, etc. But I guess the point can be debated.]
Can you name anything which has been released from any Presidential Library which caused great harm to our country?[I and close friends have done considerable research in a couple of Presidential Libraries. The secrecy was already stifling. Much WWII information will not be made public while anyone alive still lives. I don't like that kind of America, but I guess you and most Americans do.]
I believe he is afraid of many things from the Reagan years, things his father had a big hand in. But, as long as America remains ignorant of great mistakes and crimes, I guess it's ok, it's the kind of people we are.