When Adam & Eve rebelled, it caught God off guard. So He had to rush to get His Son to die for ppl's sins.
When God called Abram, He didn't know if he'd be willing, so He had someone else in mind just in case.
When He told Abraham He came down to see what was happening in Sodom and Gomorrah, He didn't know until He came down to look the situation over.
When Abraham took Isaac and laid him on the altar and drew the knife to sacrifice, He didn't know if he'd be willing to do it until that very moment.
For an omniscient God, He doesn't seem to know very much in the Open Theism teaching.
But they try to take the literal approach and end up with egg all over their faces.
He shall cover thee with his feathers, and under his wings shalt thou trust: his truth shall be thy shield and buckler.[Psalm 91:4] I guess He is some sort of super bird with wings and feathers. Hey, it literally says His feathers and under His wings. It's in the bible! Don't you believe it?!?!?