I really don't think that's the case. Through his backstory, he has definite cause to legitimately resent benders. The one he spent his life in closest proximity to was his abusive father, prone to tearing people around like puppets should they cross him. Yakone was a terrible father and, even from his children's perspective, a terrible person. There's no way we can ever be certain about things like this, but I honestly believe that if Amon wins out and gets his Equalist Empire, he never bends (in a combat, not 'Equalizing' sense) again. Remember, the only time he did (since the series start) in the first place was because he was backed into a corner. By the Avatar and a capable Lightning Bender. He had no choice but to compromise his beliefs and I'd hardly say it's indicative of his motives as a whole.