While I disagree with open theism, it's a false accusation that open theism is a modern innovation. Open theism was taught by the medieval Jewish philosopher Gersonides, as well as other medieval Jewish thinkers, based on Genesis 22:12.
Genesis 22:12
“Do not lay a hand on the boy,” He said. “Do not do anything to him. Now I know that you fear God, because you have not withheld from me your son, your only son.”
The reason why open theism doesn't contradict God's perfection is because, according to open theists, the future is unknowable because, by definition, it doesn't yet exist.
Asking if God can know a future that doesn't exist yet is, according to open theism, like asking if God can create a rock so big that even He can't lift it.
According to open theism, while God knows beforehand all the choices open to each individual, He doesn't know ahead of time exactly what man's choice will be. At the same time, God is able to fulfill prophecy by, in real time, influencing events to His will.
Open theism, just like Calvinism, Molinism, Arminianism, provisionism, etc. is a legitimate interpretation of scripture, since it has nothing to do with the essentials of salvation.
"In Essentials Unity, In Non-Essentials Liberty, In All Things Charity."
I disagree with open theism because I don't think it's strong enough on the fulfillment of prophecy, but I could be wrong, and it has nothing to do with the essentials of salvation anyway.
Ecclesiastes 7:18
It is good to grasp the one and not let go of the other. Whoever fears God will avoid all extremes.
1 Corinthians 8:2-3
Anyone who claims to know all the answers doesn’t really know very much. But the person who loves God is the one whom God recognizes.
Open Theism Bible Verses in 33 Categories
Open Theism Bible Verses in 33 Categories | Open Theism