They're killing them for food, food which has been an integral part of their culture since before we even knew they existed. It's not Genocide as they are being killed for a purpose, for food, for tradition.
Now, I don't think it's a tradition of Germany and Bavaria or a special season to gas Jews. And I doubt Mr Hussein thought "Ahh, that time of year again, let's put the decorations up and raise the SCUDs."