I'm pretty sure that nobody in the Obama administration believes something will come of these talks. I'm hoping that the White House staff has already prepared a plan for precisely that day when Netanyahu's bluff is called.
We are forced into an unfair position of being for or against a successful war in Afghanistan. It's never a good thing to be against something successful, so clearly the only rational choice is to you're for it.
The continual pre-conditions put forth by Israel and the Palestinian Authority are exactly the details that need to be discussed in formal negotiations. Instead of making demands, it's better to discuss the options.