If you are going to have a contest, 50 million Europeans, raised in Christian homes, killed each other within a few years in WWII Europe, and 6 million Jewish men, women, and children were rounded up for extermination, while the Vatican remained neutral throughout the war.
Have you forgotten what 2,000 years of Christian love looked like in Europe, with all the wars, pogroms, inquisitions, genocides, slave trading, and the decimation of native tribes throughout the New World and tribal Africa. All the conquers that came to the New World and Africa were flying the flags of Christian Kings with the blessings of the Church.
Manifest Destiny, a phrase coined in 1845, is the idea that the United States is destined—by God, its advocates believed—to expand its dominion and spread democracy, capitalism, and Christianity across the entire North American continent. The philosophy drove 19th-century U.S. territorial expansion and was used to justify the forced removal of Native Americans and other groups from their homes. The rapid expansion of the United States intensified the issue of slavery as new states were added to the Union, leading to the outbreak of the Civil War.