I think one of the reasons for the reticence about this whole issue, even after we seem to have negated most of it, is the awful realization that we have the equivalent of a dozen eggs on our face. No one likes to be taken for as much of a ride as Pakistan seems to have taken America.
Even with Tenet's assertion that the US has known about this activity on the part of Pakistan since the mid-80's, our geostrategic imperatives forced us to look the other way. At the worst, we did not know, and/or refused to believe the Indians, who, IMO, have been ringing the alarm bell on Pakistani proliferation for a while.
We was dancin' with the one we brung...
The end of the Cold War, and the possibility of realignment of alliances in South Asia which was made possible by the end of the USSR, will hopefully bring this sad chapter to an end.
As we have seen more natural alliances taking place among democracies such as India-Israel-USA, the leadership in Pakistan will reap what it has sown, I hope: isolation as a failed state like Somalia and hopefully, Saudi Arabia.
We need to do a clean up, internally, on the proliferation problem before we let them ride off into the sunset.
I don't hold out a lot of hope for Pakistan, as even its intellectual elite have sold out to Islamicism.