The union between a nation and the four proselytizing religions (Islam, Christianity, Communism, and Capitalism) is a shotgun wedding. Without political violence, en masse proselytization cannot happen. This is what history tells us.
The world’s first project for large-scale proselytization was launched in Europe, in the final decades of the Roman Empire. After that Europe went through more than 1400 years of uninterrupted prosecutions and violence (this includes the crusades, the reconquista, the reformation wars, and numerous bloody campaigns against pagan tribes and cults). By the end of the Middle Ages, most Europeans had given up their pagan religion and converted to Christianity. Once Europe was converted, the Europeans emerged from their continent to convert the rest of the world—in this they achieved great success. Today Christianity is the world’s biggest religion, followed by Islam, and then by the two modern European religions, Communism and Capitalism.
The violence caused by the four proselytizing religions in Asia, the Americas, and Africa is comparable to the violence that Europe went through.