[arthurus]

Most of the South Americans and Mexicans (very few were Incas and Aztecs) that died off perished from disease that was not the result of fighting. It came from the presence of new uninculturated microbes.And while the Spaniards were Christian they did not pursue their conquests because of their religion. Saying they did is the same as saying the Pope is responsible for all the deaths in Europe in WWII because Herr Schikelgruber was born into a Catholic family.

[razoroccam]

You are incorrect. First the specifics arthurus. Not microbes, but smallpox. Also, Aztecs and Incas, not "south Americans and Mexicans".
And now the generalities - the conquitadors specifically went after "gold, glory, and God". Read about the pope's role in it
http://iweb.tntech.edu/kosburn/history-499/the%20Spanish%20in%20the%20Southeast.htm