I don't know if this is helpful in any way, but I almost worked for Birthright at one point, and it's been nagging at me since I read your post that anyone should feel the slightest bit bad about that nonsense. The whole intense bonding thing there is extremely deliberate, shamelessly manipulative and more than a little artificial, in many ways. If you don't particularly click with the various social/emotional tricks (and, frankly, logistical tricks - there's a reason you spend so much time deliriously on the edge of exhaustion, for example. It's not because of the huge distances you simply must cover across the vastness that is Israel) they use, well, some people feeling left out and unconnected is the price they're willing to pay for the rabid devotion of the rest.