Christian chroniclers narrated Saracen raids as cosmic, portent-bearing calamities

Evidence

In the year of our Lord 729 two comets appeared around the sun, striking great terror into all beholders. One of them preceded the sun as it rose in the morning and the other followed it as it set at night, seeming to portend dire disaster to east and west alike. One comet was the forerunner of the day and the other of the night, to indicate that mankind was threatened by calamities both by day and by night. They had fiery torch-like trains which faced northwards as if poised to start a fire. They appeared in the month of January and remained for almost a fortnight. At this time a terrible plague of Saracens ravaged Gaul with cruel bloodshed and not long afterwards they received the due reward of their treachery in the same kingdom. — Sophia Rose Arjana, Muslims in the Western Imagination, 147

Categorization

• XREF: Per Biblical-era prophetic literature, natural omens (comets, plagues) get read as divine signs. Here Muslims are folded into that apocalyptic schema.