Equalists

Anti-Benders are persons who are strongly against the art of bending. They will be shown in a revolt during the new series, "Avatar: Legend of Korra."

History
Not much is known about the Anti-Benders, except for the fact that they harbor ill-will towards benders. What caused this is unknown, but it may be because of the power that benders hold in the Avatar world. As of Avatar: Legend of Korra, they are revolting.

Speculation

 * They may use some sort of advanced weaponry.
 * They may have revolted because the benders have caused many wars.
 * Another reason for their revolt may be because benders have always been in power in places like the Earth Kingdom and the Fire Nation.
 * They may be a reference to Lian, who was against benders in the Avatar Video Game.
 * If this is true, then they may use machines like Lian did.
 * It is unknown what they want to do with benders, as many people are born with bending abilities, they may be treated as second class citizens.
 * They may ride flying pigs, like the one seen in Aang's vision.

Trivia

 * As mentioned above, the anti-benders are not the first to harbor resentment towards benders. However, they may be the first canon example.