BERLIN – This is the continent where some leading thinkers are talking about a "post-Christian Europe." And this is the country of philosopher Friedrich Nietzsche, who infamously quipped, "God is dead." ... Coincidentally, some of Europe's stalwart secularists are challenging the idea that religious reasoning inevitably retreats from the public sphere as countries modernize. ... • There are more theologians in the German parliament than in any other Western parliament, including the US Congress. And when the last government cabinet was sworn in, nearly every member - instead of the usual 50 percent - opted for the religious version of...