I gave the illustration, to try to show how one might harmonize both realities. Surely you can see that.
The evidence is the scripture passage. I believe man is morally accountable, but that in another sense man, like in Romans 9, can be described as a pot prepared for destruction.
It's almost as if the freedom of the Creator is on an infinitely greater level than the freedom of the creation, however, real that freedom is.
I don't know you. I know open theism is bad juju. I do pray that you are as committed to Scripture as you say, and you'll land in a good place.