The Inquisition
s, plural, were not a bad institution. The Spanish Inquisition (one of many) got, according to some (Peters argues against this view, and I agree with him; Kamen seems to agree) a bit out of hand after the Reconquista, for the sole reason of the Reconquista (many crypto-Muslims and conversos left). The Roman Inquisition (the other major Inquisition) never got out of hand, and quietly transformed. (Edward Peters,
Inquisition, and Henry Kamen,
The Spanish Inquisition: A Historical Revision).
The Crusades (speaking of the first Crusades, which established and defended the Crusader Kingdoms, until the fall of Acre, and excluding the later “crusades”, such as the Albigensian) were
just wars of defense, some of the most just wars that have ever been fought by humanity, with a surprisingly very small number of atrocities (all wars have some atrocities committed by both sides: the Crusades are stunning in how few atrocities there are, for the scale of war that it was, in the age it was. These atrocities were in the worst, two: the sack of Constantinople, and the murder of Jews by the People’s Crusade under Peter the Hermit.
The later so-called “Crusades”, such as the Albigensian, which took as their enemy European heretics, instead of Arab Mahometan invaders and aggressors, were not just. They were wrong. But look at it from the point of view of the authorities, in a time when revolt against religion (especially for a decidedly anti-social and utopianist religion such as Catharism) was also a revolt against the civil order and government, and there are found mitigating circumstances (Edward Peters,
Heresy and Authority in Mediaeval Europe).
The last one there brings me to the conclusion that it was not the Crusade that caused Peter Hermit and Walter Penniless to murder Jews, it was anti-Semitism that did: and anti-Semitism (as in “hatred of ethnic Jews”, not as some Muslims claim to be Semites, or a belief the Jewish religion is in error) is never acceptable (for salvation comes by the Jews, and to them were entrusted the oracles of God, and theirs are the Patriarchs and the promise according to the flesh) and, is, even I will admit, a dark and recurring undercurrent in the Church’s history.