Exactly.  As Scott Ritter said this week, "There is no ligitimate reason to ask Iran to give up their stated nuclear objectives."  Its US politics.  

Iran will be delt with using international sanctions, probably for the next 50 years.

But then sanctions may be all it takes for Iran to shut off the spigots - they've already said as much (I'm sure you guys heard the "hurt and pain" comment that one Iranian ambassdor made - that gave me chills). As such, sanctions may be a complete non-starter at the UN as well.