UnMom Kills Mom. How did she know to kill her (beyond being Q3’s favorite phrase: batshit crazy)? No, don’t tell me why, tell me how?
Mom doesn’t bother to name UnNamed (the Baby in UnBlack). UnMom apparently doesn’t bother to name UnNamed, either.
UnMom renders Jacob and UnNamed incapable of harming each other. Jacob doesn’t believe her and eventually tests the theory. Even after it being proved false, UnNamed doesn’t bother to test the disproved proposition for millenia.
UnMom gives UnNamed a game (UnSpoiler UnAlert: Senet, an Egyptian boardgame), so he can speculate on things coming across the ocean to the island, though she doesn’t want him to think about things existing off the island. Apparently UnNamed is given an UnNamed game as a gift to make up for not being given a name. But at least it is cool parallel symmetry to Locke playing a Named game(Nonspoiler alert: Backgammon, unless you are watching the episodes in reverse order, in which case I just spoiled it for you), maintaining the whole Named-UnNamed thing.
Mom does UnDead appearance, either confirming that UnMom knows what the Golden Light Grotto can do because she offed someone and Mom is really a proto-smoke monster. Or a confirmation that UnDead can appear independent of the smoke monster (hey, it’s an answer, you just don’t know which question is being answered).
Other Survivors magically appear after a decade or so, apparent hell bent on being evil - they are so evil they plot to get off the island. Evil, evil, evil! (see speculation on UnMom UnBeing UnBatshit-crazy - and what’s really bad is that was supposed to be funny but at this point it actually made sense to me).
UnMom does all sorts of things that how she knows to do isn’t explained…
Watcher: Why?
Writer: Because! Hey, I never promised it would be a good answer!
UnMom confesses she killed Mom to Jacob, who remains devoted, even though he is UnLoved. But avenges UnMom when the Loved UnNamed UnLoves UnMom with his UnDull knife. Not being able to make the slightest ounce of sense of it either, UnMom thanks UnNamed - at least the writers were more merciful to her than they are to us.
So UnMom slaughters everyone before they can escape because they were supposed to do something evil and she doesn’t want to be proved wrong, kind of like how she killed Mom for the same (Un-)reason (though somehow she doesn’t seem to realize that she is exactly what she claimed they were - all together now: UnMom UnBeing UnBatshit-crazy). And so UnLocke-to-be UnDoes UnMom by back-stabbing her (you did recognize the Locke-Naomi parallel, right?) , followed by Jacob UnHurting (by definition) UnLocke-to-be, and tossing him into the UnBriar Patch, which does kill him, letting him Jacob the hook.
Well hell, it makes as much sense as most mythology, so I’m down with it! The UnExplainable UnExplained!