What Is the Difference Between Sunni and Shia?
From a Political Question to Real Theological Differences
While the Sunni-Shia split began as a disagreement over political succession, meaningful theological differences developed over the centuries that followed, particularly within mainstream Twelver Shiism, the largest branch of Shia Islam today.
The Status of the Twelve Imams
Mainstream Shia theology holds that twelve Imams, descended from Ali, possess a status Sunni Islam reserves for God alone — describing them in some traditions as infallible, all-knowing, and possessing authority over creation itself. Sunni Islam rejects this framing entirely, holding that no human being, however righteous, shares in God’s attributes, and viewing the assignment of divine qualities to any created being as a direct violation of Tawheed, the oneness of God central to Islamic theology.
Differing Views of the Prophet’s ﷺ Companions
Sunni Islam holds the Sahabah, the companions of Prophet Muhammad ﷺ, in high esteem across the board, viewing the Qur’an’s own praise of them as settled. Certain strands of Shia thought take a starkly different view, regarding many companions as having abandoned true Islam after the Prophet’s ﷺ death, with only a small number considered to have remained faithful. This disagreement carries practical weight, since it is through the companions that the Sunnah — the recorded teachings and practice of the Prophet ﷺ — was transmitted to later generations.
A Disputed Claim About Scripture
One of the more significant points of disagreement concerns the Qur’an’s completeness. Sunni Islam holds that the single Qur’an available today is the complete, unaltered revelation given to Prophet Muhammad ﷺ, preserved exactly as promised.
Certain Shia traditions hold that a separate text, referred to as the ‘Tablet of Fatimah,’ was also revealed and remains hidden, to be revealed at the end of times — a belief Sunni scholarship rejects as having no basis in the Qur’an itself or in the historical process of its compilation and preservation.
Different Sub-Groups Within Shia Islam
Shia Islam is not monolithic. Twelver Shiism, centered on belief in the twelve divine Imams, represents the largest and most widely recognized branch. Zaidi Shiism, found predominantly in Yemen, rejects the concept of divinely appointed Imams altogether and represents a theologically distinct minority within Shia Islam more broadly.
A Call for Understanding, Not Hostility
Sunni scholarship frames these differences as significant points of theological disagreement, not grounds for hatred toward individual Shia Muslims, many of whom hold these beliefs as inherited tradition rather than the product of deep independent study. The recommended response, consistent with broader Islamic teaching on unity discussed in the companion article on this split, is prayer and patient outreach rather than animosity.
Conclusion
What began as a dispute over political succession evolved, particularly within Twelver Shiism, into substantive theological differences regarding the status of the Imams, the reliability of the Prophet’s ﷺ companions, and the completeness of the Qur’an itself — differences Sunni Islam treats seriously as matters of core belief while still calling for compassion toward individual Shia Muslims.
