Critics of Islam’s origins cite specific events: the execution of several hundred men of the Banu Qurayza tribe after the Battle of the Trench, on the grounds that they had breached their treaty with the Muslim community. The assassination of individuals who had composed satirical poetry critical of the Prophet. Military expeditions (ghazawat) against surrounding tribes. The general expansion of the early Muslim community through a combination of persuasion and force.
These events are documented in the classical Islamic sources themselves. They are not fabrications of hostile historians. The question is what they mean — both for the historical character of early Islam and for the theological question of whether God guided this process.
The Banu Qurayza
The historical accounts describe the Banu Qurayza, a Jewish tribe in Medina, being besieged after the Battle of the Trench (627 CE) on the grounds that they had broken their treaty with the Muslim community during the battle. The tribe surrendered after several weeks. The sentence — execution of the men and enslavement of women and children — was given by Sa’d ibn Mu’adh, an arbitrator agreed upon by both parties, applying what several scholars identify as the sentence prescribed by Jewish law in the Hebrew Bible for a besieged city that refuses to surrender (Deuteronomy 20:10-14).
Several historical questions bear on the assessment. The treaty violation accusation is contested in the sources — the degree of cooperation with the besieging forces varies across accounts. The number of executed men varies dramatically across sources, from around 400 to over 800. Some contemporary historians question aspects of the account’s reliability.
What cannot be denied: a large number of men were killed, and this killing occurred within the early Muslim community under conditions where the Prophet did not intervene to prevent it. This is a morally serious fact regardless of the strategic or legal justification offered.
The assassinations
Several accounts describe individuals being killed on the Prophet’s orders or with his approval, for acts including the composition of satirical poetry. The cases are few, are contested in their details, and typically involved individuals who had played an active role in inciting violence against the Muslim community beyond mere verbal criticism. The classical tradition did not derive from these cases a general permission for killing critics of Islam — that development came later, under different political conditions.
But the honest acknowledgement is that these accounts exist, that they appear in the tradition’s own sources, and that they present a picture of early Islamic governance that is not comfortable by contemporary standards.
What this means and what it does not
The violence of early Islamic history does not prove that Muhammad was not a prophet, any more than the violence of early Israelite history proves that Moses was not a prophet, or the violence of early Christian history proves that the tradition was not genuine. All religious traditions that become political entities engage in violence. This is a fact about the relationship between religion and power, not a refutation of the foundational claims of any specific tradition.
What it does is complicate the claim that the Prophet’s conduct is a perfect moral model (uswa hasana) for all times and places. The tradition has always managed this complication — by contextualising conduct within specific historical circumstances, by distinguishing prophetic conduct that is obligatory to follow from conduct that was specific to its context, and by insisting that the moral principles underlying the tradition are not determined by the most difficult episodes in its history.