It is easy to cynically view the divine permission of evil as God green-lighting some odd Rube Goldberg mechanism that kicked evil into motion only to have “a greater good!” pop out in the end. But permission is not initiation, and it connotes a preference that the merely permitted thing not happen at all. Permission is not even an explanation of evil but a stance that takes it as a given. A God who is seen as permitting evils has to be seen as taking them as just there, as givens to be tolerated with disappointment and anguish.
Evil is a sort of anti-god in having no origin story, no principle of explanation, no originating cause, and whose existence is mystery. But all of these descriptions are mockeries of the divine originality, principation, a-causality, and mystery (there is no question here of some naive Manichean dualism). In a similar ironic twist on revelation, evil is a god that must be overcome and die in a definitive eschatological event.
The Enlightenment dream of a best possible world as Utopia is as impossible to divine power and wisdom as it is to human wisdom. Hell is eternal, even if its presence on earth won’t be.