Look into some of thinking of the Spanish Court regarding how to treat natives. One result is The 'El Requiremento': This document gave permission and absolution to the soldiers of the time to kill the 'enemy' with a clear conscience. Their behavior towards the indigenous people wasn't any better than the English.El Requerimiento, meaning "the requirement, or demand," was drafted in 1513 by Juan López de Palacios Rubios, a member of the Council of Castile, which advised King Ferdinand. The document was designed to be read in Spanish by Spanish explorers to American Indians, introducing them to Christian doctrine. Indians were not compelled to convert, but if they did not, they were immediately subject to Spanish invasion. The following English translation is published by Wikipedia.