While Kuja's motivations are reactions to the discovery of his own mortality and limited usefulness, I'm not willing to write that off as an excuse for his actions. Kuja definitely acts out of desperation and selfishness, and, for this, he is not undeserving of pity. However, although can justify his actions more fully than other villains in the series, I don't believe this makes him any less evil.

As far as I'm concerned, the most evil part of Kuja is that he is completely aware of the consequences of his actions. He's not bat:skull::skull::skull::skull: insane. He's not acting out because of false information. Kuja is fueling a war to ultimately destroy all life on a planet--then he goes a step further and tries to erase all existence. Yeah, it's selfish that he believes that if he can't live then no others should either, but that doesn't make it any less evil.

I'm down for Kuja.