Christianity and colonialism
Christianity and colonialism are associated with each other by some ideas, because of the service of Christianity, in its various denominations (namely Protestantism, Catholicism and Eastern Orthodoxy), as the state religion of the historical European colonial powers in which Christians likewise made up the majority. Through a variety of methods, Christian missionaries acted as the "religious arms" of the imperialist powers of Europe.
Source: Wikipedia — Christianity and colonialism (CC BY-SA 4.0)