I really wonder what advantage you think iran will bring to the US. Unless you think that radical islamism is a good ideology to spread around the world, and that the shariah may be a good basis for civil laws, because that's certainly where all the oil dollars earned by iran are going in the coming years ( just like saudi arabia spread its vision of islam in the past 30 years).
Right now, there are many young Iranians who are neutral or slightly pro-USA (they are too young to remember that we helped overthrown their democratically elected premier in the 1950s and installed the Shaw of Iran - we rememebr how that turned out for the Iranian people).
So, yes some risk, but for the USA I think the risk is very worthwhile.