I have recently been studying Francisco Pizarro and his domination over the Incas. I watched a clip called "[Guns, Germs, and Steel](http://movies.netflix.com/WiMovie/National_Geographic_Guns_Germs_and_Steel/70213243)". It was quite interesting, how Pizarro dominated the Incas with only five hundred men. However, what puzzles me was that the Incas were not hostile to the Spaniards, because they thought that the Spaniards were incarnations of their former gods. Therefore, my question is:

**How come the Incas believed that the Spanish were the incarnation of their “thunder god”?**