Have you found any version of gnosticism yet? Cuz you're not the first to have noticed these things.
Most of those stories are allegorical. You'd have to know the meaning of the symbols for it to make any sense. The problem is, the religion selects for "true believers," as does any organization. The more crazy, the more they prove they're true believers. Antifa is the same. Or any organization where the game is about getting power. This process leads away from truth and principles. The goal posts are always receding, and qualifying as a member of the organization requires passing ever more absurd purity tests, and the organization benefits by losing the members who aren't crazy enough because crazy core can do crazier things. Its an Antichrist version of self sacrifice, exactly the same as the tearful adoring crowds that used to gather in Red Square.
Any of those things you referenced can be explained rationally and symbolically. Verrrrry few people inside of the religion can do that, though, because their presence in the religion is proof that they are irrational -- but not for the reasons usually given by atheists.
This is basically the original reason for Christianity, this decay of previous religion. It is truly meant to repudiate Judaism and correct its errors, **_not imitate them._** This is why I say most Christians are actually Jews, and I don't say that with any malice towards Jews, its just a fact.