One other interesting part of the series (link below) was the final episode.
It mentioned how the worst abuses of the Native Americans by the Spaniards
was brought to an end only after a long lobbying effort by some priests.
I've been out of school many years, but I wouldn't be suprised if that
part of the story is left out of today's history textbooks.
http://www.pbs.org/conquistadors/
Europe had a long tradition of exploitation of the underclass by the nobility. The conquest of America extended the tradition of becoming landed gentry through conquest. The treatment of the Native Americans was not out of character.
I suspect you are quite right.
Thanks.