Egypt got nuclear weapons from the USSR in 1973.. and beside that,,Egypt has the Nasr family of fuel air bombs from half a ton to 9 tons the Nasr-9000the equivalent of a nuclear bombs ..but without radiation..it can destroy a whole city.. and if Israel uses nuclear weapons, Egypt can easily destroy the Dimona nuclear reactor and its city..on top of that Egypt is known for its sophisticated chemical and biological weapons..
All this to tell you that your analysis, speculations and day dreaming is baseless..