Crusadism

Crusadism is a form of militaristic Christianity that believes in the leadership of Holy Knights or Templars to uphold the beliefs of Christianity and to protect Christendom against all it's foes.

It is not afraid to enact wars and great Crusades to reclaim vital lands, ancient cities, and holy relics that belong rightfully to the Catholic Church. They are loyal to the Catholic Theocracy and the Holy Pope who speaks the words of the lord. The leadership of Crusadism within a nation ensures their people are following the holy words of the Bible and keeping away from sinful acts, the whispers of pagan gods, and the false beliefs of other religions such as it's rival Islamic Theocracy. Sometimes to ensure the loyalty of it's people, Crusadism must put a sword against their necks or keep their loyalty through kind acts such as helping the poor or the ill.

Wikipedia

 * The Crusades
 * Crusading