The Crusades and the Spanish Inquisition

Core idea

Between roughly 1095 and 1492, Latin Christian Europe ran two parallel projects of organized religious violence. The Crusades were a four-century campaign of military expeditions, initially launched to recover the Holy Land from Muslim rule and eventually used as a generic license for war against any group the papacy chose to label heretical or threatening. The Spanish Inquisition, launched in 1478 and especially active after the 1492 Alhambra Decree, was a state-and-church partnership designed to surveil, terrorize, and selectively execute religious minorities (Jews, Muslims, and later anyone who criticized authority) within Spain itself.

A founder's religion turned weapon

The author's framing is unflinching: there is something especially ironic about institutions claiming the legacy of Jesus — who explicitly opposed both wealth accumulation and violence — being led for centuries by grotesquely wealthy power-brokers whose primary activity was organized killing. This is not an attack on Christianity itself; it is a structural observation about what happens when any founder's radical message is acquired by a state apparatus. The acquisition almost always inverts the message.

The Roman inheritance, the Persian inheritance

A useful comparative frame: the Christian empires of the Middle Ages self-consciously inherited Roman institutional habits — intolerance toward local religions that challenged the imperial cult, expansionist warfare, slave-based economics. The Islamic empires of the same period inherited Persian institutional habits — relative religious tolerance, opposition to slavery (by medieval standards), and more progressive attitudes toward women.

This does not make medieval Christians worse people than medieval Muslims; it makes their institutional inheritances different. The Crusades look almost inevitable when you trace the Roman lineage forward.

Why it matters

The Crusades and the Inquisition are the canonical Western examples of religious institutions wielding state-level violence. They are routinely invoked — by Hitchens, by post-9/11 commentators, by every freshman seminar on religion and politics — as evidence that organized religion is uniquely dangerous. The topic's more careful claim is that organized religion is uniquely dangerous when it is fused with state power and inherits an imperial template. The same Catholic church that ran the Inquisition in Spain ran charitable orders, hospitals, and universities elsewhere; the variable is the political marriage, not the theology.

Crusade and jihad are not synonyms

A common modern confusion the author corrects: crusade and jihad are not equivalent terms.

• Crusade is from the French croisée — the cross worn by the crusaders. It refers to their fashion, not their ideology, and it was coined in the late Middle Ages by Westerners to describe themselves.
• Jihad is the Arabic word for struggle. It can mean warfare (especially defensive warfare), but it more broadly means any sustained effort — including spiritual self-discipline. The phrase greater jihad in Islamic tradition often refers to the internal struggle against one's own ego, not external war.

Treating the two as direct counterparts in modern political discourse imports false symmetry.

Key takeaways

Mental model

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The Inquisition's operational pattern

The author gives a vivid example of how the Inquisition actually worked, drawn from real surviving records. In August 1635, one Joan Compte, age 55, was detained and interrogated. Under questioning he eventually revealed that he had once witnessed a man eating bacon and onions on the day before the feast of St Bartholomew — a fast day in the church calendar. That was enough. Compte was released. The man he named was now the next target.

The pattern is consistent across centuries of Inquisition records:

1. Detain a random individual on minimal pretext.
2. Hold them in isolation; let them believe their life is in danger.
3. Apply interrogation, sometimes torture.
4. Release them as soon as they betray a neighbor.
5. Move to the next target.

This served two complementary masters. The church got a steady supply of accused heretics to prosecute. The monarchy got a population conditioned to inform on each other and afraid of any independent association. It is the medieval template for what twentieth-century scholars would recognize as a secret-police regime: random arrest, denunciation-as-currency, generalized fear.

The Treaty of Granada — a parable in bad faith

In November 1491, Spain persuaded the independent Islamic state of Granada to surrender by signing a peace treaty: Granada would accept Catholic rule, and in exchange Spain guaranteed Muslims could continue to practice their religion freely.

Spain violated the treaty four months later by issuing the Alhambra Decree, which expelled or forcibly converted both Jews and Muslims throughout the Spanish kingdom. The Treaty of Granada is one of history's cleaner case studies in a powerful party signing a treaty in order to win a surrender, then disregarding the treaty as soon as the surrender is complete. It is a pattern that recurs constantly — in the European conquest of the Americas, in nineteenth-century treaties with indigenous nations, and in many twentieth-century decolonization arrangements.

Example

The structural test for "religious" violence

Imagine you are reading a news report about violence committed in the name of some religion. The topic's framing suggests a test you can apply to almost any such case to see what is actually happening:

• Is this violence being carried out by state institutions wielding religion as legitimation? Or by freelancers invoking religion as cover for unrelated grievances?
• What does the underlying economic logic look like? Who profits from the violence — and is that profit named, or carefully unnamed in the official justification?
• Does the religion's founder text support the action, or does the institution have to reach pretty far to justify it?
• How is the targeted population described — as a present threat, as a historical grievance, or just as "the other"?

Apply this test to the Crusades: state-sanctioned, profitable for European nobility (land, loot, social mobility), poorly grounded in the Gospels (which counsel non-violence), and rhetorically positioned against an undifferentiated "Saracen" enemy. The picture that emerges is organized violence by a state-church apparatus that found religious framing useful, not religious devotion that spontaneously produced violence.

The same test works on contemporary religious violence too — and usually gives the same answer.

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