As the anniversary of 9/11 approaches, I find myself asking out loud a question I’ve whispered to myself often since the Twin Towers came down: Is the U.S. relationship with Israel worth it? This was a lot easier to answer during the Cold War, when the U.S. supported Israel in order to counterbalance Soviet influence in the region. But, that was a long time ago, and though the Russians are still active in the Middle East, it’s not on the same scale. Stable oil markets are also a longtime reason we have supported Israel, but that situation is changing too,...