So I should think that it's true, and then and only then should I find out what it says. And then whatever it says, I should go on thinking that it's true.
Well by that procedure, you could believe any dumb crap no matter how counterfactual and self-contradictory. And indeed, it's a procedure that one would only want to apply if one wanted to have a good chance of believing something false. No-one sincerely wanting the truth would have anything to do with it.
One question that occurs to me is how you picked the text to which to apply this strange method of non-critical analysis. Why the Bible and not Alice In Wonderland? It can't have been through reading it and becoming convinced that it was true, because apparently one has to be convinced of that before one reads it --- otherwise one ends up like me, thinking that it's a load of old cobblers.
God does not change, He is the same yesterday today and forever, but IN RELATION TO HUMAN BEINGS He seems to change, such as changing His mind about punishing us if we repent of what He was going to punish us for and that sort of thing. Or by granting our prayers. That's the kind of thing that is put in our terms.
So, is it true or false to say that God changed his mind?
It's true from our perspective, in relation to our human time-bound experience, completely true: He does change in relation to our prayers, our changes of heart and so on.
But on the level of His being in eternity, no. The question about God's foreknowledge is on the level of His being in eternity, it doesn't affect us personally, which is why I keep answering as I do. There is no way His foreknowledge can change, so that He has it at one time but not another, in relation to one thing but not another, it's part of His very being. But again, it doesn't affect us at all in our everyday choices and actions.
So is it true or false to say that God changed his mind?
Did he first intend to destroy the Israelites, and then after he talked to Moses abandon that intention, as the Bible says; or is he changeless and did he never have any intention of destroying the Israelites?
Yes, I think I knew the Bible was God's word before I actually read it or read much of it ...