The Hebrews could have been a people in Egypt. Obviously they couldn't have built the pyramids, but they could have been among the conscripted Delta farmers to move Pi-Ramses when a branch of the Delta changed course. Whoever wrote Exodus had an uncanny knowledge of a city that had ceased to exist hundreds of years before it was written. Having said that it's hugely unlikely there was an "exodus" on the scale as described in the bible, the lack of evidence is overwhelming. We're talking about one of the rockiest deserts on the planet, when a patrol of 20 Egyptians passes through we can see evidence, when the Hyksos made a camp we see evidence, when a hermit lived in a cave there we see evidence, yet when there was between 100,000 and 1,000,000 people living there for 40 years we find absolutely nothing after decades of intensive and extensive searching? Come on.