Most people say that his motives changed in the last battle, that he just decided that he wanted everything to be destroyed because it was going to happen anyways, infact, everything he had done previously in the game was justified or finally given reason, in the final battle.
If that's true, why he didn't kill everyone the second after acquiring the power of the statues? Why permit everyone to live during a whole year?
Question: Do you know why Kefka succeeded in destroying the planet?