For generations, Americans have been told to celebrate diversity, honor every culture, and preserve the stories that shaped the nation. Yet when it comes to Christianity--the single greatest influence on America's founding and development--many of the same voices suddenly insist that history be edited, minimized, or investigated. That contradiction was on full display this week. Democratic Rep. Adelita Grijalva vowed that if Democrats regain control of the House, they will investigate the prominent inclusion of Christianity in America's 250th birthday celebrations organized under President Donald Trump. Think about that for a moment. As America approaches one of the most significant...