NEW YORK – Earlier this month, Muhammad Youssef Abdulazeez, a 24-year-old US citizen of Middle Eastern descent, opened fire at two military sites in Chattanooga, Tennessee, killing five. This act of local horror was also one of national significance, for it vindicated the late US diplomat and strategist George F. Kennan’s warning that American foreign policymakers should hold in check their urge to act, especially militarily.