or, Active imagination as a mystic practice
This seems to dig and tug deep in Spiegelman's psyche. And as an aside, it might show a main difference between storytelling and active imagination, in the sense that a story usually has the impact on the reader as the main goal. Active imagination seems more like stumbling around in the deep of you own inner world and discovering unresolved or contradictory parts of your partly unconscious world.
To his thoughts, maybe there is something about his own ideas about the source of evil, mixed with his own feelings of not having done enough for the good in the world. The notion of a God, as the force of Good, that is hiding and ashamed and splintered sounds more like something in Spiegelman, than a collective unconscious or transcendent wisdom. It might be a "remapping" of the true Divine to his own guilt of not doing "enough" in its service. Especially the combination of that image and the points about not seeking the source of evil but pursuing distractions or living with distrust instead. Maybe it was something in his time - or from his life experience. And also, the feeling of dis-unity is not necessarily a collective condition, nor necessarily how it should be by nature. It could even be his own mind giving him clues to how to unify his own psyche (in a right hemispheric way), in the Divine light. Wonder if he ever read Dante, and if so, what he thought of it.