Thanks. GUWonder, yes I'm a US citizen; maybe the second passport wouldn't be that much help if it is in itself a red flag. And I gather I shouldn't wear any shalwar kameez I bought in Peshawar or Kabul, or bring my copy of Lonely Planet Guide to Afghanistan.

The multi-entry visas were 1) harder to get and 2) the security concerns for going back and forth across the Khyber Pass were somewhat onerous, so I thought they might arouse more suspicion. It seems to me that a two week short term aid mission (and I carried a letter from the NGO documenting that) corroborated by entry and exit dates two weeks apart is more self-evident than shuttling between a Kabul hospital and refugee camps near Peshawar.

I'd still like to tour Israel, so maybe I will ask the trip sponsor (Sabeel) what their thoughts are. They support the rights of Palestinian Christians, so they probably know something of the nuances of dealing with Israeli security. The trip would likely involve visits to the West Bank with still more security checkpoints.