Egypt had been restricted to a position of minor importance south of the land of Judah.
Say what? I don't have any history books in front of me right now but since when was Egypt ever considered of "minor importance"? Maybe as a personal opinion but in reality I'd have to say "I don't think so!" Egypt was always a key player.
Why didn't the Isrealites build pyramids, sphinxes, etc.? Too busy wandering the desert like bums and/or pissing off most every other tribe in that part of the world? Oh, give me a break!
Robert