Equalists

Anti-Benders are an organization against the art of bending.

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. It is unknown what they will do to the benders or if they harbor resentment to the current Avatar.

Speculation

 * They may use some sort of advanced weaponry to compensate for their lack of bending ability.
 * 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 Avatar: The Last Airbender (video game).
 * If this is true, then they may use machines like Lian did.
 * There were rumors (or possibly a confirmation) that Mike and Brian that the show has some relation to steampunk, so the possibility of the anti-benders using machines is quite high.
 * 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.
 * It is highly likely that they suffer from an extreme case of "bender envy".

Trivia

 * As mentioned above, the anti-benders are not the first to harbor resentment towards benders. However, they may be the first canon example.
 * The anti-benders have nothing to do with Energybending, which has been described by Mike and Bryan as "anti-bending".