Extinct ghulat sect of Shia IslamDhammiyya was a "Ghulat" sect within Shia Islam. The name "Dhammiyya" was derived from the Arabic word "Dhamm," meaning blame. Therefore, the Arabic name Dhammiyya is translated as blamers. The sect was also known as the 'Ulyaniyya or 'Alya'iyya, named after ‘Ulyan (or 'Alya) ibn Dhira' as-Sadusi (or ad-Dawsi, or al-Asdi), and appear to have been active around 800 CE.
Beliefs.
The Dhammiyya Shia believed that Ali was God and Muhammad was his appointed Prophet. They believed that while Muhammad was the appointed Prophet of Ali and acknowledged him to be God, he called for the worship of Allah and deceived people into thinking that Allah was God instead of Ali. They believed that Muhammad was sinful for doing so, and worthy of blame- from which the Dhammiyya get their name. They also believed that Fatima, the child of Muhammad, was a male and not a female. 
Some of the Dhammiyya Shia had the following beliefs: