As I understand it, the IAEA is working closely Iran, and Iraq currently has good relations with Iran. Saudi isn't happy about the Shia PM of Iraq, and it's sectarian differences mean that it views any Shia, regardless of nationality or ethnicity as being 'in league/surrogates of Iran. It treats it's own Shia population as third-class citizens (below women who are second-class citizens in Saudi).
My considered opinion is this:
Bush's administration have a vested interest in stepping up the rhetoric at this particular time. First there is the anniversary of the Katrina catastrophe in New Orleans, so looking outwards at this time is useful for deflecting public from troubles at home, and the Attorney General story is about to explode, the public are focused on yet another Republican sex scandal, and so the Bush Admin are trying to whip up the anti-Iran rhetoric as much as they can while the corporate media focuses on the Attorney General story (
http://www.truthout.org/docs_2006/082807R.shtml)
There's no support in Europe for US Admin's "bomb Iran" line - and outside of the American-right and the Bush Administration, there's no real public support for bombing Iran back into the stone age in USA either. As far as I'm aware, the Israeli public are not behind the neocon/Likud support for another war, and certainly not with Iran. Israelis are still visiting their family there, and there are more pressing issues on the home front, such as Hebron, the failure to deliver Kadima's election pledges, and sex-and-business scandals amongst it's own political elite.
A US-rightwing -spun s/urge for Israel to bomb Iran is about as popular as a suicide bomber in Israel at the moment. One imagines that the average citizen there believes that bombing Iran would be suicide, precipitating the permanent war that the Rapturists/War Machine are looking for. In the aftermath of Lebanon 2006, US Neocons (via Meyrav Wurmser) expressed their disappointment that Israel had not bombed Syria (which is part of the Bush Admin/Neocon plans for 'regime change in the Middle East. The general reception by the Israeli media to this, after Bush Admin had 'forbidden' Israel to negotiate with Syria recommending an all-out military confrontation between Israel and Syria was way off the mark - Israeli diplomats had been in covert talks with Syria for some time, something the Bush Admin/Neocons didn't approve of. That revelation and lack of concern from the US for Israel's long-term relationships with it's neighbours was a revelation, and a telling example of how US strategy is dangerous to all the peoples of that region.
The popularity of the 'Israel vs. Iran' scenario with the antisemitic CUFI is precisely due to it's ideology which is anti-Jewish in nature, and believes that Jews must ingather in Israel then perish in the Tribulation, and only a small number of those who've converted to it's brand of faux-Christianity will survive to see 'the Messiah' (a complete manipulation of prophecies, not unlike attempts made by Hitler's Nazi ideologists). The Jewish liberal/left in USA are well aware of what's going down on this front, and they are, shall we say, 'on the case'. They've been very active in bringing it to public attention, but rarely makes it into the corporate media. Max Blumenthal did a 'Louis Theroux' and went into CUFI with a video camera, and shot this alarming footage:
http://www.huffingtonpost.com/max-blumenthal/rapture-ready-the-unauth_b_57826.html (watch it!)
Two important articles here, from Dilip Hiro, give a glimpse of what's behind the Bush Admin's machinations:
29/8:
http://commentisfree.guardian.co.uk/dilip_hiro/2007/08/wrong-footed_at_every_turn.html
30/7:
http://commentisfree.guardian.co.uk/dilip_hiro/2007/07/desperate_bush.html