Who were the Safavids?

In another blow to Sunni-Shia reconciliation, yesterday's gruesome execution of former Ba'thist judge Barzan Ibrahim al-Tikriti, was described with historical resonance as "the grudge of the Safavids" by his son-in-law. A misjudgment in the length of rope required to hang Saddam Hussein's half brother led to his decapitation, a scene thankfully not released by the Iraqi government to date. From the Yemen, Azzam Salih Abdullah, claimed that the beheading was an act of revenge by the newly empowered Shia leaders. Reference to the Safavids is significant, as it was this Iranian dynasty that established Shia Islam in Persia, creating the first Shi'a state. Originally from Iranian Azarbaijan, the Safavids built an empire between 1501 and 1736 that stretched eastwards to Kandahar, and bordered the Ottoman Empire along the Euphrates. Baghdad was sacked as part of an early campaign, and constant invasion by both the Safavids and Ottomans led to the city's decline until the 20th century. History in the Middle East enjoys cycles and the peoples feed on it and cherish it. History pays back them in return, and often with added tragedy.