Much has justly been written about the Obama administration’s mishandling of Israeli-Palestinian talks. But it’s important to remember that the real barrier to an agreement isn’t flawed American diplomacy but rather the Palestinians’ refusal to accept Israel’s right to exist. Nothing better illustrates this fact than a stunning new poll by The Israel Project. Like every other poll in recent years, TIP found that a strong majority of Palestinians (60 percent) accept a two-state solution. This unvarying finding is often cited as proof that Palestinians do, in fact, accept Israel’s existence. But unlike any other poll I’ve ever seen, TIP...