Poor little German pilots with your GPS and doppler radar, autopilots, redundant avionics, jet engines, and pressurized, climate-controlled cabins. And something might go "boom" a mile or two from the runway! Flying can be so scary these days!
You would be the first one to barf if the Captain flew close to a thunderstorm. Flying is a cruel mistress laddie.She rarely allows you one mistake. The pilots are thinking not only of themselves but also the 300 or more souls entrusted to their care who have no say so about what happens between take off and landing. 30000 accident free hours speaking here sonny and proud of it.
Crossing airspace over territories in which irregular forces have rockets of one kind and another is never a good idea. One ill-disciplined squad of Worthy Oriental Gentlemen whose antihelminthic drugs are not working that day may decide to take a shot with or without orders and get lucky.
Of course, the Israelis can take care of that before it happens by resettling Gaza. If they need labor, I suppose Team Obama can supply them with illegal aliens who will do the work Arabs seem loathe to do (which IIRC, is any work at all).
BTW, The PLO, HAMAS, The Saudis, etc. have enough money to buy every Arab Man Woman, Child, Goat, and Camel living in Israel a ranch in Brazil, or any other country that likes Muslims. Yassir Arafat alone left an estate of 9 Billion POUNDS in England.