We were spiritually dead, not brain dead.
You want to make the Gospel something so "out of this world" that it is impossible for any brain to comprehend. God has made it easy. He knows what we are up against.
Rahab was not brain dead that's for sure. Neither was the king of Jericho. But the one made RIGHT CHOICES and the other did not.
Question to the super-determinists:
Does the memory of the Lord drying up the Red Sea resound and reverberated to this present day? Well, it does. This was the beginning of Rahab's believing back then. And likewise it can be to ANYONE today. Anyone without exception.
Bottom line.....the whole world knows the fame of the God of Israel back then and of Jesus at His advent. The only matter that remains is what every man CHOOSES to do with these startling revelations.
[Jos 2:8-10 KJV]
8 And before they were laid down, she came up unto them upon the roof;
9 And she said unto the men, I know that the LORD hath given you the land, and that your terror is fallen upon us, and that all the inhabitants of the land faint because of you.
10 For we have heard how the LORD dried up the water of the Red sea for you, when ye came out of Egypt; and what ye did unto the two kings of the Amorites, that [were] on the other side Jordan, Sihon and Og, whom ye utterly destroyed.
*********************************
And what is this? "The Egyptians shall know"? Well I think that the Egyptians made the same mistake as the king of Jericho....BAD CHOICES.
[Exo 7:5 KJV] 5 And the Egyptians shall know that I [am] the LORD, when I stretch forth mine hand upon Egypt, and bring out the children of Israel from among them.
*************************************