- X created the world.
- X created the world to torment it.P
POne might reason: "It is not possible to create a being in order for that being to be subject to eternal pain, because to create pain itself is to create pain as something that a being is to avoid if that being exists and is able to feel it, and so to create a being to feel pain would be to create a being to be unable to do what 'conceptually fits' to pain, i.e. to conflict with the inner purpose of creating a being as a being." (This is the kind of reasoning we find in scholasticism, for example, if not necessarily per my case as stated.)
FSuppose, towards a possible contradiction, that it was possible for there to be a Form of Evil, in a roughly Platonic sense. Now if evil-in-itself can't be "willed" (if no one can deliberately act under the description, "What I'm doing is evil in general, and that's why I'm doing it!"), then either a Form of Evil is an exception to this rule, or conforms also hereto. It's more interesting, in my eyes, to see where the latter option leads us. If even a Form of Evil can't will contrary to the Form of the Good per se nota, what can it will for? Perhaps not even directly its own victory.
While "ignoring" their own malice, then. But is that possible? Even the Forms of Evil participate in the Form of the Good, to be Forms at all. And so they are caught up in the manner of the Form's influence on the possibility of knowledge (e.g. as by the power of the Forms of Knowledge and Power). How could a Form of Evil "not know" that it was doing something wrong by trying to destroy other Forms of Evil? Or by doing anything at all? If there are Forms of Good and Evil, then do the Evil ones not project their essence into the world of exemplars, through (or not through) a demiurge, but are "stationary" instead?
Addendum: TV Tropes reference: although philosophical content (and the alleged value of that content) can vary greatly from book to book, movie to movie, etc., and so we might not think to glean much, if anything, of philosophy per se, from fiction, yet with respect to ethics—for which fictionalism, relativism, subjectivism, non-cognitivism, quasi-realism, and error theories are all "live options"—it does not seem amiss to work out a sort of methodological fictionalism, i.e. an appeal to the distribution of moral concepts and attitudes throughout literature and other narrative media. So the litany of texts and other examples of imagined evil Gods seems extensive enough to support (in an "experimental philosophy" way) the claim that, "God is evil," is not absolutely self-contradictory (or, even if it is, then so much the worse for the traditional claim that we cannot truly think through the absolutely self-contradictory?).