The OP starts, "As the title says, if he exists, can Biblegod be destroyed?" The OP does not request proof that the Christian God exists. Throughout the OT and NT there is the understanding, perhaps even the assumption, that God exists and has to exist. So if the God described by the bible exists then he cannot not exist.
No, the most you've got here is, "If Yahweh exists, then his propaganda literature says
he cannot not exist." Yahweh makes all manner of grandiose claims for himself (and presumably "inspires" his press secretaries to do so on his behalf), but the narrative passages of the Bible, which portray him (and his human and spiritual enemies) in action do not support those claims, as I demonstrated in my previous post.
It seems to me that it is so obvious that YHWH did not mean "absolutely everything including destroying me" in that statement in Genesis that it was not included. If it had meant "including destroying me" then it would be totally at variance with the rest of Genesis and the rest of OT and also the NT.
How so? The very existence
of opposition to Yahweh--Satan and his angels, the gods or spiritual "princes" of other nations, the "principalities and powers" that Paul speaks of in his epistles, the battles prophesied in the Book of Revelation--presupposes that opposition to Yahweh is possible. The spirit beings presumably have much more direct and extensive knowledge of Yahweh and his powers than any humans do, including Biblical writers who, the Bible tells us, just wrote what they were told. That these spirit beings are portrayed going toe to toe with Yahweh and his angels and holding their own or even winning
on some occasions represents Biblical proof of the contention that Yahweh can be defeated, at least in principle. If it were otherwise, the actions of these spirit beings would make no sense.
Why fight an invincible foe? If there's zero chance of victory, would it not make more sense for them to just go relax on a beach somewhere, or go surf the Crab Nebula? It's a whole lot less work than engaging in a bunch of pointless "spiritual warfare." For that matter, Yahweh's
actions wouldn't make sense either. Why should he
fight, if his would-be enemies can't hurt him? What does he even need an angelic army for? Why does the Heavenly City have walls and gates? If a group of toddlers attacked Godzilla, would Godzilla care? Or even notice?
That Yahweh does
notice, and is repeatedly portrayed responding as if he is, in fact, threatened by both human and spiritual adversaries, is inescapable Biblical proof that the claims of his propagandists are wildly exaggerated.
Your approach is akin to someone in 1950 saying, "It says in this issue of Pravda
that the Soviet Union is able to produce three harvests a year because of the discoveries of Lysenko and the superiority of collectivized agriculture. Therefore, the Soviet Union can't not
produce three harvests a year. It's right here in black and white!"