"Free will is only the human ability to defy the will of God."
What is the will of God again?
"Free will means we get to screw things up. "
Yes, because you know how big of an effect your daily choice in lunch snackery has on the universe
"if God told the primeval Hebrews that they had no free will, how do you think their culture would have evolved?"
I would suppose the same thing that happened in america where we have freedom and justice for all.. and "equality"