Oh whoopie!

I'd trust them about as far as I could throw them, which is not at all.
It's not a matter of trust. It's a matter of common interest. The Saudis, Jordanians, etc, have more to lose than we do if the Jihadists become the dominant political arm in the ME. But they know damned well that anything seen as anything less than complete oppossition to Zionism is seen as treason.
It's kind of like when you guys whine, "Where are all the moderate Muslims" and they answer back, "Why should we get involved?"