For starters, Paul has no problem with Iran acquiring a nuclear weapon.
He has stated point blank he does not want them to have one. He has also surmised, not unreasonably, that for Iran to acquire a nuclear weapon and use it would be nothing short of national suicide. He's right.
You are woefully misinformed if you think Ron Paul would not engage in retaliation if an attack of that kind would befall us. Some have said - Bachmann for example - that we cannot wait for that point in time. I tend to agree to some degree. But realistically . . . Iran is not worth all the trouble and posturing.
I'm writing from the gut here. If you know Iran poses an immediate threat in terms of a nuclear attack on us or our allies, by all means I am open to the information. And so is Ron Paul, and every other candidate for the Office of President. To me the threat is more immediate from Statists in our own midst. Ron Paul is as anti-Statist as it gets.
We either trust the citizens of this country to conduct themselves honorably among one another without and overarching, overreaching human authority, or we don't. We've got to work things out civilly; get the monkey of federal meddling off our backs, and off the backs of folks out there who wonder why we've invited our ideals into their "paradise" of slavery.