The way to rainy mountain

1- read this quotation from “the way to rainy mountain.”
A single knoll rises out of the plain in Oklahoma... they gave it the name of rainy mountain. The hardest weather in the world is there. Winter brings blizzards, hot tornadic winds arise in the spring, and in the summer the prairie is an anvil’s edge”

What is the central idea about the Kiowa is momaday expressing by describing this landscape

2 - one of the central ideas of the selection is mixing of different cultures and culture identities. This is generally presented as a good thing. What are some examples (2-3) of this idea in the story.