Hope you haven’t drunk the kool-aid.
Here is a short article from the opposite point of view
http://www.aish.com/societyWork/sciencenature/Archaeology_and_the_Exodus.asp
Also, have you ever read David Rohl’s Pharaohs and Kings? Good read that essentially dispels all that conventional wisdom states concerning Egyptian Chronology.
Rohl’s chronology is very controversial and not accepted by most scholars. Kenneth Kitchen, perhaps the leading scholar on Ramesses II and the New Kingdom, does not accept Rohl’s chronology.
I'm not surprised that there are dissenting views on such a controversial subject. I'll read it if I have the time...but I can never have anything but a well-educated amateur's opinion on the disputes of experts.