Egypt is in dire need of a couple of tac nukes. One over Cairo, one at the Aswan.
Extreme doubt obtains that a nuke of any description would be needed for Aswan. And, the flood waters from the destroyed dam could very easily do Cairo a real number without all that pesky radiation in the air.
Morsi is talking out his keffeyeh, and both Israel, and Morsi's own generals know it. He enters into this at his, and his peoples' own peril...