As ISIS makes inroads into Libya, officials in Rome are panicking about an Islamic State just across the sea—but have no idea how to combat the crisis. ROME — Last weekend in Italy, as the threat of ISIS in Libya hit home with a new video addressed to “the nation signed with the blood of the cross” and the warning, “we are south of Rome,” Italian prime minister Matteo Renzi shuttered up the Italian embassy in Tripoli and raised his fist with the threat of impending military action. Never mind that Italy has only 5,000 troops available that are even...