News flash: The U.S. is the only country pushing anti-Iran propaganda down their citizen's throat. The rest of the world does not see Iran as a threat, and actually perceives Israel and America a much bigger threat to the stability of that region. There will be no "multi-national" invasion.
First of all, I said nothing like that in my post, other than when I used the word "Iran" talking about something completely different. But anyway, you are wrong.
Iran is heavily involved in trafficking of ballistic missile technology and nuclear technology with North Korea, Syria, and Pakistan, which ALL other nations see as an extreme proliferation risk. If you read skimmed through any of the diplomatic cables, you would see that an ENORMOUS number of them deal with proliferation issues around the world that affect international interests. Iran is also an enormous supporter of Hezbollah and Hamas and their shah-lead dictatorship is openly hostile to the Western world (rightly so since liberalization weakens their grip on power.) If you think the majority of the countries of the world have friendly relations with Iran, you are very, very mistaken. Iran is recognized as a concrete threat to the greater international community, but the cost to do anything about them is very high. The problem is, our entire global civilization revolves around oil, and nobody wants to fuck with the oil supply unless they really have to. This is the case whether you are talking about sanctions or whether you are talking about an invasion disrupting the oil flow for some years. Here's a recent article from The Economist:
France has led the way in offering European Union support, recalling its ambassador for consultations in Paris (in common with several other EU countries), and calling for a new sanction barring EU countries from buying Iranian oil. At a meeting of EU foreign ministers on Thursday there was much talk of solidarity, but no agreement on boycotting Iranian oil. Spain and Italy had grumbled at the level of diplomats in working groups that they would need more time to find alternative sources of energy. Greece, which is heavily reliant on Iranian oil because few other suppliers are willing to supply a country on the brink of bankruptcy, blocked a boycott. A report on the EUObserver news website quotes unnamed diplomats saying that some other countries were also hiding behind Greece, saying "People don't say it out loud. But there is an understanding oil sanctions would hurt the EU rather than hitting Iran where it hurts and would make oil cheaper for China."
The IAEA recently released a report concluding that Iran was actively involved in nuclear weapons research and development. Don't let the calm wording of the report fool you, this is a big deal for the IAEA to come out and say. The IAEA has often stymied US efforts in the past to get viable sanctions against Iran, because the IAEA is extremely impartial, and they never make assumptions or report findings without extremely strong evidence. They have a very long history of not kowtowing to the greater powers, such as the US.
This isn't propaganda against Iran just because these reasons may justify a later war. When you get down to it, this is a country that gives enormous support to real, actual terrorists and openly subverts attempts by the international community to contain its nuclear weapons research and conventional weapons proliferation. If you truly believe only the US cares about this, then you should asking your government WHY they aren't doing more. Thankfully, however, your world view is incorrect and the international community actually is interested in containing Iran and the huge proliferation risk they pose to the world at large.