Yes, the arrival of evil Western civilization's influences caused all this - and by extention, it's all President Bush's fault!
What an arrogant statement by westerners to assume that their ancestors' arrival was the greatest upheaval to ever hit the indiginous peoples of south america. There are natural disasters like volcanoes, earthquakes, landslides, meteor strikes, changes in the ocean currents and climates leading to floods, droughts, and wildfires; and the actions of local inhabitants, like attacks by other tribes and the practices of their own evil leaders and witch doctors who enslaved and butchered the people to factor into their history, but only the arrival of a handful of gringos into their densely populated cities could possibly trigger the frenzied bloodshed of innocents.
I don't buy it.
Their own superstitions and demons condemned them.
No Spanish conquest, no sacrifices -- well, not these sacrifices, anyway.
So these sacrifices at the margin will suffice to inculpate Spanish civilization, and by extension, as you point out, the heirs and defenders of Western Civ, most particularly George W. Bush.
You're right -- it's Bush's fault!