Let's hope the following is somewhat correct:
... senior administration officials argued that Thursday's blacklistings were carried out within the framework of the existing sanctions regime, which had forced Tehran to the negotiating table, and did not constitute new measures.
The blacklisting of a dozen additional foreign firms and individuals for evading US sanctions was widely seen as a way to head off moves in Congress to impose additional sanctions that would be in clear breach of the Geneva agreement.
If Iran will return to the table, the US will make it up to Iran later. It will also give the US immediate ammunition to be able to say to the Zionists that Iran is bending over backwards to make a good deal all the way around. It will seriously diminish or even take completely away one of Netanyahu's talking points.
Don't be rash, Iran. Don't react with a knee jerk. Remain calm and focused on the end deal, not the small obstacles thrown in your path. Let the Zionists be the immature ones all by themselves.