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.
Rohl isn’t an amateur. He is a credentialled Egyptologist and has spent a lot of time studying the field.
You can read a little of what he has to say here:
http://www.newchronology.org/cgi-bin/somsid.cgi?session=1216788116&page=html/authors/auth-r