how does crooks feel about lennie's dream of "livin' off the fatta the lan"? why is he so bitter?

When Lennie tells Crooks "about the rabbits", Crooks vents about his mistreatment as an African-American. Their conversation takes an unsettling turn as Crooks teases Lennie about his lack of self-reliance; he tauntingly asks Lennie what he would do if George were injured. Unable to think hypothetically, Lennie thinks that George is actually under threat. With some difficulty, Crooks calms Lennie down and takes on a kindlier demeanor. His sour attitude remains, however, as he tells Lennie that his dreams of owning a farm with rabbits is unlikely to amount to anything tangible.