Alan Dershowitz is an America-hating Bleeding-heart Liberal

About 8 years ago, I remarked to my eye doctor that maybe Alan Dershowitz's torture warrant idea wasn't such a bad one if the alternative was no accountability at all. Apparently he thought Dershowitz was an America-hating bleeding heart liberal, though, because he launched into a rant about how the CIA isn't stupid, they know that torture can produce unreliable information, and they always verify torture intelligence against other information gathered. (Other highlights: the ticking bomb scenario proves that using torture to gather intelligence is always justified; we don't know what is going on, so therefore no one should oppose it.)
Now that we have the Senate report, we know that my eye doctor was hopelessly naive. The CIA did indeed take intelligence gathered under torture as gospel, sometimes to disastrous ends—nearly letting bin Laden's driver get away, torturing innocent people whose names were given up under torture, etc.
I guess I shouldn't be surprised. What would an eye doctor from Bend, Oregon know about the CIA's torture program?