I read that it's a good thing to hold back Iran oil with sanctions right now, though. Because of the oil glut. Don't know if that's true, but if so....something to think about.
Killing one person is murder, killing 100,000 is foreign policy
Tactically, I believe the partial lifting of sanctions was not a wise move. It merely lowered the marginal gains of reaching agreement, as a smaller share of sanctions would then be lifted. Preferably, the lifting of sanctions should occur in phases over a fixed period of time once there is a credible agreement, with those phases being tied to measurable performance on the part of the Iranians.
If the recent news accounts are accurate, it seems that a much weaker arrangement may be evolving, Iran has rejected one important component of a verification regime (snap inspections), and Iran may not be willing to even accept a specific and concrete framework by the end of this month. Add to it the IAEA Director General's recent commentary about the two unresolved substantive issues and Iran's lack of cooperation in addressing them, one should reasonably be concerned that the kind of credible agreement that is needed is something that Iran won't accept.
One question, though. If we reinstate full sanctions, does that prevent Iran from pursuing the nuclear option? Or does it just make it harder for them to make enough money to do it faster? Seems to me sanctions is helpful but doesn't address the source of any particular problem (like Cuba).