nt on, however, the Shi'a began to show a preference for particular Hadith and Sunnah literature.
Interpretation of the Hadith and Sunnah is an Islamic academic science. The Shi'a gave preference to those credited to the Prophet's family and close associates. The Sunnis consider all Hadith and Sunnah narrated by any of twelve thousand companions to be equally valid. Shi'as recognise these as useful texts relating to Islamic jurisprudence, but subject them to close scrutiny. Ultimately this difference of emphasis led to different understandings of the laws and practices of Islam.
The Mahdi
The concept of the Mahdi is a central tenet of Shi'a theology, but many Sunni Muslims also believe in the coming of a Mahdi, or rightly guided one, at the end of time to spread justice and peace. He will also be called Muhammad and be a descendant of the Prophet in the line of his daughter Fatima (Ali's wife). The idea has been popular with grassroots Muslims due to the preaching of several Sufi or mystical trends in Islam.
Over the centuries a number of individuals have declared themselves the Mahdi come to regenerate the Muslim world, but none has been accepted by the majority of the Sunni community. However, some more Orthodox Sunni Muslims dispute the concept of the Mahdi because there is no mention of it in the Qur'an or Sunnah.
Shrines
The Wahabi movement within Sunni Islam views the Shi'a practice of visiting and venerating shrines to the Imams of the Prophet's Family and other saints and scholars as heretical. Most mainstream Sunni Muslims have no objections. Some Sufi movements, which often provide a bridge between Shi'a and Sunni theologies, help to unite Muslims of both traditions and encourage visiting and venerating these shrines.
Practical differences
Prayer
All Muslims are required to pray five times a day. However, Shi'a practice permits combining some prayers into three daily prayer times. A Shi'a at prayer can often be identified by a small tablet of clay from a holy place (often Karbala), on which they place their forehead whilst prostrating.
Leadership
Today there are significant differences in the structures and organisation of religious leadership in the Sunni and the Shi'a communities. There is a hierarchy to the Shi'a clergy and political and religious authority is vested in the most learned who emerge as spiritual leaders. These leaders are transnational and religious institutions are funded by religious taxes called Khums (20% of annual excess income) and Zakat (2.5%). Shi'a institutions abroad are also funded this way.
There is no such hierarchy of the clergy in Sunni Islam. Most religious and social institutions in Sunni Muslim states are funded by the state. Only Zakat is applicable. In the West most Sunni Muslim institutions are funded by charitable donations from the community at home and abroad.
How do Sunni and Shi'a view each other?
The persecution of the Prophet's family and the early Shi'as provide a paradigm of martyrdom which is repeated throughout Shi'a history. The relationship between Sunni and Shi'a Muslims through the ages has been shaped by the political landscape of that period.
As the Sunni Ottoman Empire expanded into the Balkans and central Asia and the Shi'a Safavid dynasty spread through the Persian Empire from the 16th century CE, tensions arose in Sunni-Shi'a relations.
The majority of Sunni and Shi'a Muslims do not allow their theological differences to divide them or cause hostility between them. For example, Shaikh Mahmood Shaltoot of the Al-Azhar University in Cairo, the oldest institution of Islamic learning in the world, considers Shi'a Islam to be of equal status to the four Sunni schools of jurisprudence.
However, current global political conditions mean there has been a degree of polarisation and hostility in many Muslim societies. The term Rafidi (meaning "Rejecter") has been applied by radical Sunnis to disparage Shi'as. In turn the Shi'as will often use the label Wahabi, which refers to a particular sectarian movement within Sunni Islam, as a term of abuse for all those who disagree with Shi'a beliefs and practices.
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