What does this book tells us about the relationship between Christianity and colonialism?

An amazing thing to take note of is the faith of the Catholic missionaries. They lived amongst all the massacre and bloodshed, witnessing thousands of innocent people die. Yet throughout the conquest the missionaries remained at their posts. They defended the natives daily despite the fact that the Spaniards were turning the natives against the missionaries. De Las Casas barely escaped one native revolt that led to the death of a few friars. There were other friars besides De Las Casas who wrote to the King of Spain, believing that if they sent accounts and evidence of the unjust massacres to the King that he would put a stop to all the killings. They believed that he would remove the evil commanders and replace them with people who actually cared about saving the people in the New World from eternal damnation. This shows tremendous faith in the King and in the Christian religion. To believe so firmly that the unveiling of justice would lead the King to stop the lucrative slave trade was one thing, but to risk their lives to remain in the New World attempting to convert and baptize all of the natives they could, whether they were killed or not, was something else that was greater than all of them. They had a true belief in God and in Jesus Christ. That is an amazing faith to have amidst the terror that the New World encountered.