Just to be clear, I am only asking if it's possible and/or feasible. I am not desperately wedded to the idea, and for that matter, neither is my TL idea.
I fully and freely admit I do not know anything about the topography of the region. In fact, I would honestly like to know what's stopping the Red Sea from flowing into the Dead Sea right now.
All I want to know is if some crazy renaissance genius were to look at the situation on the ground, and had virtually unlimited resources at his disposal, would he try?
probably not with you know freshwater and all that being uhm important