actually he strengthened pharaohs heart. by starting small and ending large. so when the last plague came, Pharoah was so hardened, he would do what God needed.
He did not force pharaoh to do anything
Oh...I agree totally. But that is what FWers believe because in their world God didn't harden Pharaoh's heart until after Pharaoh hardened his own, otherwise God would have "forced" Pharaoh's hand and caused the king to sin. God simply mimicked the king.