Jordan has pretty much given up haven't they?
Egypt HAD given up, but thanks to the "Arab Spring" it would seem all bets are off.
KSA had never had too much fondness for Israel, but what with their Shittite Nemesae to the north (and south, and east) getting unruly and groping for atom bombs . . . A newfound appreciateion for the Abrahamic founder religion may just be in the future for the KSA douche bags. Course the preachers are too crazy to ever follow a rational strategy, but the Princes are pretty good at keeping them "more or less in line" . . .
"Palestine" 4.7m, mostly brain-damaged morons who think that strapping on a bomb vest and running into a checkpoint is "good tactics" . . . Not sure we should "weigh" them as being "equal" to the other "Arabs" . . .
Lebanon . . . haven't heard much about them lately. Last I heard, they had no running water, and were using plastic sheeting to keep the rain out of most of their buildings? Oh sure, I bet they do still have SOME intact buildings, but the overall impression I had last time I check was that Lebanon was a country that was about "half ruined" both in terms of physical infrastructure, as well as mental health and social order.
Syria . . . worse than Lebanon I'd say. Assuming Assad "wins" within the next five years, I suppose at that point rebuilding could ensue. But I honestly don't see Syria placing much threat on any external polity at any time in the next 10 years. Just gut intuition though.
ADDIT: Ninjaed by Sneero, with whom I am in a surprising degree of agreement!
It would seem Egypt is the only country which has not suffered such terrible physical harm that it COULD (if it gets itself sorted out sufficiently) post a threat to Israel, but like I said: they've been in the "we don't care" camp for many decades now and I don't see that changing.
The only true threat to Israel I'd say is Iranian atomic ballistic missiles.