It is axiomatic that an omnipotent deity only does what He wants to do so we can conclude that the deity doesn't want do that.
If the deity wanted to make everyone into a believer everyone would be a believer, since an omnipotent deity can make everyone into a believer. This is logic 101 stuff. It is also what Baha'u'llah wrote.
If God proved to everyone that He exists then it would not be possible to distinguish between people and how much they really care about believing in Him. In short, God wants everyone to prove their worthiness.
It's remarkable to me that this deity always seem the choose to do what would be the case in a godless universe.
This is also the case with the garage in which Sagan's invisible dragon lives. It is indistinguishable from a garage with no dragon in it. It's axiomatic that the dragon just doesn't want to be found. How do we know? Have we found it? No. If it wanted to be found, it would have made itself findable, so since we can't find it, the only possible conclusion is that it doesn't want to be found. It wants us to prove our worthiness by believing in it anyway, a common measure of worthiness, the willingness to believe for no reason.
Either it's known with certainty beforehand what I'll do or it isn't.
Not if you don't want it to be and you are willing to believe otherwise by faith. Then you can have both, and nobody can tell you otherwise. You just keep repeating that the world is predictable, and that free choice occurs as well, and nobody can get you to say otherwise.
Why would one do this? My guess is that it's the same reason as with the Christians, who need both an omniscient God and for damnation to be just, which requires free will. I don't know what the Baha'i and Muslim beliefs are to know why they so tenaciously cling to this contradiction, but you'll have about as much luck taking it away from them as you would a pork chop from a coyote.
False consensus, a relatively new term for me meaning the mistaken assumption that others are basically like oneself apart from superficial differences, and that this idea, which seems so simple and clear, can be understood by anybody if just the right words are found. Let's see, I said it in post xxx, but I guess it wasn't simple enough. Let's add an an example. Hmm, still not understood. Let me try again. Surely, if I find the right world,. they will unlock this mind like a key.
But of course, that's incorrect. That mind is radically different from yours, something false consensus says isn't the case, can't be the case. After all, it formed the same way mine did. But that's a mistake. There is no way to penetrate the shield of confirmation bias when a person is willing to believe by faith, disregard reason, and has a stake in denying the logical. The theist wants free will to be both free and predictable, so to him, it is - end of thinking. You can't penetrate that.
I think you probably know that already, but don't fully believe it. Surely this person wants to see reason if they don't already. But no, they don't.