The allies of the Islamic Republic of Iran, the Assad government in Syria, Hezbollah in Lebanon and Hamas in Gaza are under pressure as result of the war in the area and their value is rapidly declining as vital part of Iran's strategy to face any possible attack by the USA due to Iran's nuclear program.
Iran is aware that, not if but when the regional support of their allies falls away, its options are limited to;
Iran was always open to "flexibility" when it came to diplomacy and that got Iran to where its today ...... some chess-players might think "so far, so good".
Because of the gradual increasing squeeze by sanctions, the axis of financial ties between the Islamic Republic of Iran, Syria, Hezbollah and Hamas had to rely more on underground (illegal) financial streams. Those financial streams are also instrumental for Iran to fund several anti US and anti Europe terror organizations operating in Europe , the Middle East and Africa.
Iran has significant potential to be divided by its internal and cross border religious and ethnic groups that seem to be adamant to reclaim their ancient rights. ( What Kurds think about Rouhani’s visit and promises in Kurdistan ) Kurds, Taliban but also the Khorasan Province branch, which is active across the whole of Afghanistan plus the adjacent parts, including Iran.
Iran could try to delay that process of uprisings, also across its borders. Enabling a "Gorbachev scenario", with "Dear Mr. Rouhani tear down this wall!"
Direct action is useless if it doesn't increase the chances for Iran to be a respected regional power and fulfill its destiny in the Islamic world. To attain that, Iran has to successfully attack at least one of the large (economic) stakeholders, "The West".
Europe being tactical and strategic the weakest, the United States off guard by its own (global) strategies and the decades of diplomacy that left ample time for Iran to prepare for an attack with "Microwaves From The Sky" (EMP)
First published by Ultrascan AGI in July 2007
CNN Oct 12, 2015 - The Emad (Pillar) surface-to-surface missile, designed and built by Iranian experts, is the country's first long-range missile that can be precision-guided until it reaches its target, said Brig. Gen. Hossein Dehqan, Iran's defense minister
IHS Janes Oct 13, 2015 - The Iranian coverage also showed what was presumably the re-entry vehicle hitting the ground and the resulting crater from what appeared to be a live rather than inert warhead.
CSIS Oct. 07, 2014 - a missile known as the Emad-1 MRBM, with 1700km range, 500m accuracy, and 750kg payload. It is a variation of the Shahab-3 MRBM. It is Iran’s first maneuvering reentry vehicle equipped system (to improve accuracy), liquid propelled, equipped with SATNAV, and reported to be slated for deployment sometime after 2016. To date, there are no indications testing has occurred. Note: The CEP is a dramatic increase over the Shahab- 3’s CEP of approx. 2,000m
The deputy head of Iran’s Revolutionary Guards warned Europe that if it threatens Tehran, the Guards will increase the range of missiles to more than 2,000 kilometres