No, no, no, no, no, no.
Kefka lost his mind to the experiments that gave him the ability to use magic. After that he was a complete sociopath. Nothing that happened in FF VI corrupted him. He was corrupted already.
Kefka is insane. As in, completely batinsane. He hates everyone and wants them all to suffer and die. He's not like Ultimecia or Kuja who are just scared of their own mortality. He's not like Vayne, who wants to manipulate history to free humanity. He's just completely and totally evil. He has nothing to gain from the things he does besides the intense joy he gets from making people suffer.
