2. How, according to Junior, is the game "like watching dogfighting” for the right spectators? What type of figurative language is this?

A simile.

Explanation:

While being interviewed by a local news crew before the game against his old friends, now turned enemies, Arnold Spirit Jr. (known as Junior) feels uncomfortable with the questions. He´s suspicious of white people wanting to see Indians play against each other as if they were a degrading spectacle, like "watching dogfighting". This is a simile, a figure of speech that compares two different things by remarking their similarities.

as much wood as a woodchuck could chuck if a woodchuck could chuck wood.

sadly it cannot chuck wood

they insisted that there was not enough time to learn everything.  

explanation:

if they were going to steal the answers that is simply because they insisted that there was not enough time to learn everything.