Right-wing and left politics are important to be in the avatar world. People express their opinions about the politics they chose, and be heard. In Legend of Korra, the equalists have traits of socialist activists and poor workers of revolutions. Struggle and hardship make them strong and persistent. It is for the sake of the people.
Yet they have some hatred of benders like the germans were to the jews. Balance is to be preserved and kept that way. I hope you appreciate about my saying.