Amid continued American entanglements in the Middle East, neoconservative commentators seek to shore up the tired status quo by delegitimizing foreign policy dissent. Nowhere is this more evident than on the ever-radioactive issue of the U.S. relationship with Israel. Fearing an above-board debate, these gatekeepers have marshaled obscurantist phrases such as “Code Pink Republicans,” a guilt-by-association tactic meant to negatively polarize the conservative base in favor of staying the course on U.S.-Israeli relations. Add to the mix old classics like the “isolationist” slur and the conspiracist obsession with the “Soros-Koch” complex, and neoconservative hawks are working overtime to stigmatize long-standing...