In the interim, many Latin chroniclers and Western theologians developed the view that the Saracens were pagans who bore a striking resemblance to the Roman idolaters of antiquity against which the earliest generations of Christians struggled. This construction of Islam as paganism was particularly prominent around the time of the First Crusade, serving as one of the major propagandistic tools used by crusaders to justify their efforts to conquer the Holy Land. The struggles of ancient Christians against Roman idolaters were now replicated in the battles waged by Christians against Saracen pagans. Crusaders could find comfort in knowing that the risks they undertook were not in vain but were part of an ongoing battle in Christian history to eradicate those enemies of Christ who worshipped false gods and idols.

XREF: Connects to broader scholarship on how religious others are constructed to legitimize violence and holy war.

Green, Todd H, The Fear of Islam_ An Intro…, loc. 125