Depends upon how you define heresy. If heresy = 'Not in accordance with accepted doctrine', then you're right. If heresy = 'false' or 'untrue', then I'm convinced that you're wrong.
And I say that the reason that he knows everything is that he does have an undo and a redo button and he has used both in the past. Satan has similar tools as well, but...that's another can of worms.
Once again, I believe that you're thinking in linear time. I'm thinking sequence.
The deeper question is, if you make an honest mistake... but take responsibility for it, make restitution for it, learn from it, and never repeat it again... then was it really a mistake?
I would suggest that you contemplate the effect upon your faith if it turned out that your position was wrong, as I have the effect upon mine if my position is wrong.
Be very careful about making a false accusation. I have not "rejected the word of the LORD." I have come to a deeper and better understanding of both it and the Persons behind it.
For the present, I'm not trying to say that you need to believe me nor that you need to agree with me. I'm just saying what I think in a marketplace of ideas with the hope of iron sharpening iron. You don't need to believe me...but you should believe that I DO believe it.
God exists and operates from outside of our space-time continuum, or He could not be the Creator. He sees all of history at a glance. His omniscience precludes error.
The question has been asked of you, and I hope you will answer: do you hold to open theism?
You are referencing the omniscient God here, yet this statement has no basis in theology. What passage in the Bible can you use to defend it?
According to what you say, God is not omniscient. Is that your belief?
I do not believe in dualism. What I believe is quite complex and would take some length to fully explain. I'm not sure anyone here's really interested.
What if after several "sequences" of events concerning the worlds rejection of Jesus Christ God determines that He made a "mistake" in having sent His son Jesus Christ to redeem mankind and now decides to take responsibility for it, make restitution for it, learn from it, and never repeat it again, He then empties heaven of the "saved" shuts down the Gospel never again to save anyone and further destroys the earth and all its inhabitants?
This seems entirely possible using your definition of a "mistake".
Let me look up "Open Theism", I'm not familiar with it. I'll get back with you on that.
The scripture has numerous references where God changed his mind or was willing to (Numbers 14:11-23, Genesis 18:22-23). God explicitly stated that prophecies of judgment were always conditional (Jeremiah 18:7-10). Paraphrasing Greg Matte of Houston's First Baptist: The defining characteristic of God is not immutability or omniscience; the angels around his throne do not cry out, "Omniscient, omniscient, omniscient!" God's defining characteristic is holiness...and if you can propose a course of action which is more holy than the one he has in mind he will either listen patiently and then let you know why and how you are wrong...or else adopt it and say, "Thank you." If God was unwilling to listen and improve his plan then we might just as well worship a God of wood or stone.
God was not omniscient in the early "layers" of the process. He has been surprised quite a few times, both unpleasantly and pleasantly. However, in the final analysis he does absolutely and completely overcome evil and the evil one and attain to total omniscience of the past, present, and what we call the future (which is to him the zone of time in which it may still be possible to make changes and improvements). And, since he is indeed a being outside of time, that omniscience and omnipotence touches and reshapes all of linear time from infinity past to infinity future.