Orthodox Islam and Christianity hold mutual heresy accusations rooted in Crusade history

Evidence

For if orthodox Christianity regards Islam as a heresy, orthodox Islam has historically regarded some of the main tenets of Christianity as altogether blasphemous: the idea of the Trinity, the idea of Jesus as a Son of God, the further idea that Mary was a virgin, the even more scandalous idea of the Holy Ghost. The legacy of the Crusades lives, we might recall, on both sides of the orthodox divide. — Aijaz Ahmad, In Theory, 784

Categorization

• DEFINE: Defines what has historically been at issue between orthodox Islam and Christianity: the status of Christian tenets like Trinity and virgin birth as blasphemous, not Jesus’s Qur’anic standing.
• XREF: connects to: Islam was framed by Byzantine chroniclers as an offshoot Christian-Jewish heresy — John V. Tolan, Saracens, 410; Medieval Christian polemicists framed Islam as lust-driven heresy rather than separate religion; Medieval Christian polemic framed Islam alongside heresy and Judaism — Norman Daniel, Islam and the West, 1045 (+8 more)

Broader Connections

• Orthodox Islam and Christianity each deemed the other’s core doctrine heretical #corroborates (0.95) — Aijaz Ahmad, In Theory, 784
• Medieval Christian polemicists framed Islam as lust-driven heresy rather than separate religion #epitomizes (0.90)
• Medieval Christian polemic framed Islam alongside heresy and Judaism #epitomizes (0.90) — Norman Daniel, Islam and the West, 1045
• Medieval Christians framed Islam as an old heresy rather than a new religion #exemplifies (0.90) — Robert Irwin, For Lust of Knowing, 48
• Islam was framed by Byzantine chroniclers as an offshoot Christian-Jewish heresy #expands (0.85) — John V. Tolan, Saracens, 410
• Medieval Christians typologically framed Islam as recapitulating earlier heresies #expands (0.85) — John V. Tolan, Saracens, 133
• Medieval Christians first classified Islam as heresy within their own taxonomy #expands (0.85) — John V. Tolan, Saracens, 738
• Islam threatened Christianity because it mounted a rival revelatory claim #expands (0.80) — Deepa Kumar, Islamophobia and the Politics of Empire, 64
• Medieval Christian polemicists projected their own violence onto a monolithic Islam to justify crusade #expands (0.80) — Norman Daniel, Islam and the West, 746
• Medieval churchmen genuinely debated whether Islam was heresy #expands (0.80) — Norman Daniel, Islam and the West, 1036
• The notion of orthodox Islam functions inside religious disputes, not neutral historiography #complicates (0.75) — Talal Asad, Formations of the Secular, 1053