Since the early medieval period, Christendom largely viewed Islam as a Christian heresy and Muhammad as a false prophet, a servant of Satan, or the Antichrist.

Evidence

Medieval Christian views on Muhammad (Wikipedia)

Categorization

• XREF: connects to: American Orientalism is the living root system that drives Islamophobia. — Khaled A. Beydoun, American Islamophobia_ Understanding…, 168; Medieval Christians identified Muhammad with Behemoth, Leviathan, and the Antichrist; Prideaux related the rise of Muhammad and the bishop of Rome’s claim to reign over all churches. Hence, the “Antichrist seems at this time to have set both his Feet upon Christendom together, the one in the East, and the other in the West.” (+8 more)

Related

• Medieval Christians identified Muhammad with Behemoth, Leviathan, and the Antichrist (similarity 0.88)
• Medieval Christians read the Antichrist prophecy as prefiguring Islam (similarity 0.85)
• In colonial America, many Protestants associated Islam and Catholicism with the Antichrist. Indeed, Prideaux related the rise of Muhammad and the bishop of Rome’s claim to reign over all churches.… (similarity 0.85)
• The Crusades introduced the figure of Muhammad as the anti-Christ into European thought (similarity 0.84)
• Theological explanations blamed Christian corruption and cast Muslims as God’s punishing instrument (similarity 0.83)
• Medieval authors mislabelled Islamic Christian and Jewish influences as heretical sects (similarity 0.83)
• Prideaux related the rise of Muhammad and the bishop of Rome’s claim to reign over all churches. Hence, the Antichrist seems at this time to have set both his Feet upon Christendom together, the… (similarity 0.83)
• Many historians trace the structural distortions of Islam represented by modern Islamophobia to medieval Europe, and aversive portrayals emerged nearly as early as Islam itself. (similarity 0.83)
• Twelfth-century Christians catalogued Muhammad as a compiler of condemned heresies (similarity 0.83)
• Early Protestant writers framed Islam’s rise as divine punishment for corrupted churches. (similarity 0.82)
• Medieval Christians understood Islam only as a distorted copy of Christianity (similarity 0.82)
• Medieval Christendom defined itself by expelling threatening forces beyond its perimeter (similarity 0.82)
• Early Protestant polemicists linked Islam with Catholicism and Judaism as apocalyptic rivals. (similarity 0.82)
• Muslims were cast as apocalyptic beasts within Christian eschatology. (similarity 0.82)
• Luther and the Reformers saw the Turk as a sharper Antichrist than the Pope (similarity 0.81)

Broader Connections

• Medieval Christians identified Muhammad with Behemoth, Leviathan, and the Antichrist #corroborates (0.95)
• Muslims were cast as apocalyptic beasts within Christian eschatology. #corroborates (0.90)
• Prideaux related the rise of Muhammad and the bishop of Rome’s claim to reign over all churches. Hence, the Antichrist seems at this time to have set both his Feet upon Christendom together, the… #expands (0.80)
• In colonial America, many Protestants associated Islam and Catholicism with the Antichrist. Indeed, Prideaux related the rise of Muhammad and the bishop of Rome’s claim to reign over all churches.… #expands (0.80)
• Early Protestant polemicists linked Islam with Catholicism and Judaism as apocalyptic rivals. #expands (0.80) — Peter Gottschalk and Gabriel Greenberg, Common Heritage, Uncommon Fear, 99
• Colonial Protestants yoked Islam and Catholicism together as twin Antichrist powers #expands (0.80)
• Muslims had ‘contempt towards the gospel,’ as Smith said in 1835, drawing on his experience in Turkey. Starbuck concluded in 1892, ‘Christendom and Mohammedanism have been misled by no false… #expands (0.75)
• Austrian theater masks gave Satan the exact face of a Black Muslim #exemplifies (0.75)