Historically, about 75 percent of the world's population lived in Asia. About 60 percent lived in China and India. I notice you have not referred to them. So most of your references are to the people who formed 25 percent of the world population.

As for Islamic invasions, Spain Portugal and Sicily were ruled by the Arabs. Eastern Europe was ruled by the Ottomans. But every Muslim in Spain and Portugal was told to convert, flee or die. In the Ottoman Empire, large Christian communities lived for centuries. That is why Eastern Europe is still majority Christian.

The Spanish and the Portuguese forcibly converted all South American natives to Christianity. The Brits, French, Germans, Portuguese and Belgians forcibly converted Africans to Christianity. Slaves from Africa were also forced to convert by their European masters.