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No. Muslims belong to Islam.
Dervishes are members of the Sufi's and thus mostly Sunni Muslims.
Most Iranians are Muslims; 92% belong to the Shi'a branch of Islam, the official state religion, and about 8% belong to the Sunni branch of Islam. The remaining 2% are non-Muslim religious minorities, including Bahá'ís, Mandeans, Yarsanis, Zoroastrians, Jews, and Christians.
Most Muslims in Ethiopia belong to Sufi-inspired groups or are Sunni Muslims. There are almost no Shiites in Ethiopia.
The Sunni Muslims. However, all Islam followers are Muslims irrelevant to which school they follow.
Most of them are Sunnis.
The Muslims in Afghanistan are predominately Sunni Muslims
Mainly Sunni Muslims
Most Iranians are Muslims. Around 90%[1] belong to Shi'a branch of Islam, the official state religion, and about 9% belong to the Sunni branch of Islam. The remaining 0.4% are non-Muslim religious minorities, including Bahá'ís, Mandeans, Hindus, Yarsanis, Zoroastrians, Jews, and Christians
NO. Parsis or Zoroastrians belong to Zoroastrianism, which is a very different religion than Islam, which Muslims belong to.Please see: What are some differences between Zoroastrianism or Parsiism and Islam?
I believe that the majority of Iranians are Shi'a Muslims.
Most Bosnian Muslims are of the Sunni Sect and the Hanafi School.