Well Iraq and Jordan are in no position to repel an attack by Syria and/or Iran. So Saudi Arabia would have to plan for a defense of those countries or a defense that assumes those countries have been overrun.

As for Israel all middle eastern nations consider it their top threat and plan to fight it. Border or no.

look at the countries

Not forgetting that some idiot handed one of those countries to the Iranian based supreme coucil for islamic revolution

I don't know but more and more i think that you don't really know the region. You should visit it, its worth a travel. There are some really pretty jewish synagogues in Teheran our Travel guide back then said there are 25 around the country. Also worth a visit are the Esther, Mordechai und Habakkuk Shrines in Hamedan or the grave of Daniel in Sush. :03:

Arabs talk much when the day is long, but there is a big difference between their words and their doings.
Syria is not able to attack Saudi Arabia, Jordan or the Iraq. The syrian Army is not even able to get rid of some not really well trained and (for now) not even well equipped so called "Freedom Fighters".
Syria is not a thread for Israel, they have to much trouble in their own henhouse and it never was a military thread at all before.
The Syrian Army tried four time against Israel and failed greatly four times.
They lost 870 MBT's alone in the Yom Kippur war 1973 against a smaller IDF at the Golan Heights .
They Syrian Army even failed against the Jordanian Army back in 1970 at the socalled Black September. When there is one absolutely overrated Army in the region, than it is the syrian Army. Period!
Jordan is one of the most stable nations down there and is not a thread at all for Israel.
In its momentary state also the Iraq is not a thread for Israel at all and i highly doubt that they are able to threaten anybody in the near future.

Iran is a major threat for the Israelis (funding terrorism), but even when Iran would start a ground offensive thru the Iraq, which they couldn't even perform in the first Gulf War 1980-1988, the Iraqis would fight them with all they have.
Take a closer look at the Iranian Tank Force, thats more a big museum than a capable Fighting Force not to talk about the problem with spare parts for their mostly overraged western tanks.
http://www.armyrecognition.com/moyen..._equipment.htm

And the Iranian Air Force, well i would estimate that they could fight the Israelis not longer than a day before the Iranians get shot out of the skies.
http://www.globalsecurity.org/milita...-equipment.htm

As evil the Iranians may be, even the Ayatollahs know the word "suicide".
Do you really think that Israel would stand just at the side watching over the fence when such a Conflict would break out.?