I don’t think they knew anything particularly damaging, other than that this could probably have been done long ago and Obama didn’t do it until it became politically expedient for him.
But I do think that Obama’s AQ buddies had demanded a blood payment for the death of Osama. Probably a lot of money had changed hands, too, hence the name “Extortion 17.” It’s certainly not impossible that an Afghani suicide bomber had gotten himself onto the flight, but it was most certainly an ambush and they had no chance. For one thing, the ROE forbade them from firing.
I disagree that Obama did this. Just don’t see that at all. Sorry.