On the evening of Sept. 12, 2006, my wife and I were dining in Cracow with Polish friends when an agitated Italian Vaticanista (pardon the redundancy in adjectives) called, demanding to know what I thought of “Zees crazee speech of zee pope about zee Muslims.” That was my first hint that the herd of independent minds in the world press was about to go ballistic on the subject of Benedict XVI’s Regensburg Lecture: a “gaffe”-bone on which the media continued to gnaw until the end of Benedict’s pontificate. Eight years later, the Regensburg Lecture looks a lot different. Indeed, those...