"Do we quietly encourage ethnic cleansing?"

(Walt in FP) "... The next president may also have to face up to the fact that there isn't going to be a two-state solution between Israel and the Palestinians, and begin to think seriously about what an alternative U.S. policy should be. Obama has already learned that trying to pursue the 2SS is "just really hard," and Romney famously told a group of fat cat GOP donors that he didn't think that goal was achievable. I've always seen the 2SS as the best outcome given where we were, but it is no longer realistic to expect it to happen. The Israeli right has no interest in it, the Palestinians are too weak and divided to put meaningful pressure on them, and the United States is too compromised by the Israel lobby to be an effective mediator. The "two-state solution" has become a fig leaf for politicians to hide behind, while realities on the ground make it less and less likely by the day.
But sooner or later, it will be obvious to everyone that it simply isn't going to happen. As I've argued before, that epiphany raises all sorts of awkward questions:  In particular, what outcome should a liberal democracy like the United States favor if "two states for two peoples" is impossible? Do we abandon our commitment to "one person, one vote" and endorse permanent apartheid? Do we abandon our deep commitment to a Jewish state and support a one-state democracy for all the inhabitants of Israel/Palestine? Or do we quietly encourage ethnic cleansing? 
No matter who the next president is, I'm sure they will try to avoid those awkward questions for as long as they can. But they may not be able to do so forever without looking like they are living in fantasyland...."