They apparently realise they also can use an Iran on the way to nuclear parity with Israel for their own benefit. Once Iran has levelled the playing field, the Arabs realise that this will make it much harder and more dangerous for Israel to do what it has done since it's existence: regular and repeated destruction of cumulation of arms in Arab hands, whether by surprise raid or open war. Arabs have been forced by Israel to be very carefull in acquiring truly modern and effective weaponry, for they know from experience the Israeli planners go to work then. It seems their self confidence is at a historic high considering this issue.
Australian, Thai journalists acquitted of defaming Thai navy (AP)
from the article: 'Bush sold Arab states arms in violation of deal with Israel'