Bigger predators and sheep/goats/etc don't mix well in general (should not be a surprise).
Protecting the rights of bigger predators over those of shepherds/farmers is something that rich nations can afford, but it still meets a lot of popular opposition (=> see wolves/brown bears in central Europe). An economically weaker nation like Egypt can not justify a move like that, especially if the animal in question is useless for tourism, too.
Don't worry too much tough, spotted Hyenas are not threatened.