(This takes 5⅔ minutes to read.)
Since Islam emerged centuries after Biblical times, it was uneasy for Christians to make sense of it. This was when anti-Judaism came in: Christian élitists tapped into this old source to familiarize their audiences with Islam, understanding it almost like a de facto Jewish sect, and Muslims as little different (if at all) from Jews; therefore it seemed just for Christians to oppose Islam.
David M. Freidenreich’s Jewish Muslims: How Christians Imagined Islam as the Enemy is opulent with examples of this. The entire book is worth reading, but I’ll focus on some of my favorites to keep this topic at a manageable length. Note that in premodern times, outsiders seldom called anybody ‘Muslims’ and preferred terms like ‘Saracens’, ‘Arabs’, ‘Turks’, or even ‘pagans’. Nevertheless, there can be no doubt, judging from the contexts, that these outsiders were referring to Muslims.
Quoting pages 165–6:
The Muslim ruler Yazid II (r. 720–24) ordered the destruction of all Christian images in the Abbasid Empire—and Eastern Christians placed the blame on a Jew. According to an account delivered at the Second Council of Nicaea in 787, “There lived a certain man in Tiberias, a ringleader of the lawless Jews, a magician and fortuneteller, an instrument of soul-destroying demons […] a bitter enemy of the Church of God. On learning of the frivolity of the ruler Yazid, this most-wicked Jew approached him […] saying, ‘You will remain thirty years in this your kingship if you follow my advice’”—namely, to destroy all representational paintings. Yazid eagerly acted on this guidance; “abominable Jews and wretched Arabs” carried out the order because Christians refused to destroy the sacred images themselves.¹
The most striking aspect of this narrative, found in both Greek and Latin accounts, is that it makes no reference to Islamic principles or even to Muslim hostility toward Christians.² Yazid acts for the sole purpose of securing a lengthy reign; his successor reportedly cancels the edict and kills the Jew simply because the prophecy failed. The Jew alone is “a bitter enemy of the Church of God,” and the tale never explains this enmity because Christian audiences presuppose that Jews are, by definition, anti-Christian.
The Muslim ruler is the willing agent of Jewish malevolence rather than an actor pursuing his own political or theological agenda. Put differently, the alleged motive behind this assault on Christian images is Jewish, while the Muslim ruler provides the means to enact it.
Page 174:
In the second Mâcon letter, the king of Tunis likewise urges the Jews to act quickly to poison the Christians without concern for cost. “You are our brethren in law,” he writes, expressing the notion that Muslims and Jews adhere to the same religion. The theme of brotherhood permeates this brief letter, in which the king of Tunis offers to care for the children of French Jews “like my own flesh.”
The portrayal of France’s Jews as allies and even brethren of foreign Muslim kings renders the Jews themselves as disloyal foreigners with both the means and the motive to pose a serious threat to the king and his subjects. A truly Christian king of France would not protect the Jews but rather expel them; some chroniclers suggest that Philip V did just that in the wake of these allegations.¹⁹
Pages 196–7:
According to Luther, Psalm 74 literally condemns the Jews who lived from the time of Jesus through the present day. At the same time, the psalm speaks allegorically of Turks and Christian heretics, “because that which the faithlessness of the Jews did and does to the people of the synagogue all heretics and, even more so, the Turks did and do to the people of the church.”⁸
Just as the leaders of the Jews willfully block their followers from recognizing and accepting Christ as God, so, too, heretics and Turks prevent Christians from following Christ properly: heretics through their allegedly false teachings and Turks through their alleged refusal to allow any sort of Christian teaching. Luther regards Muslims as political enemies of the church, but his association of Turks with Jews enables Luther to emphasize the theological dimensions of this enmity. Muslims, like the Jews of Jesus’s day, purportedly use their worldly power to stifle Christian faith.
Luther repeatedly associates Turks and heretics with Jews as he progresses verse by verse through Psalm 74. The psalmist, Luther explains, cries out against “that which is incorrigible, obstinate, and desperate, which fights even against the known truth […] a defense of one’s own righteousness and a stubborn vindication of one’s own thought, as in the case of the Jews, heretics, and Turks.”
Heretics and Turks, no less than the Jews, have torn down “faith in Christ and the works of faith” and instead “set up their own faith, their own belief, their own meaning, their own works.” The long-standing discourse of anti-Judaism shapes Luther’s understanding of the psalmist’s words and also provides the negative reference point with which, by analogy, Luther associates Muslims and heretics.⁹
In one respect, Luther declares, Muslims are even worse than Jews:
With every device, with every use of the tongue, [Jews] are active in persuading their people not to believe in Christ. This is what it means to cut down the gates of the soul with axes and hatchets [Luther refers here to verse 6]. The Turk, however, does this not only by means of the tongue and the word, but also through the sword and death he forbids the hearing of Christ’s Word. By this means, he utterly destroys the very gates of salvation.
This last one is my most favourite. Page 154–5:
In the climactic battle scene, the sultan’s own son and heir appears with “thirty thousand Turks descended from Judas,” the Jew who betrayed Jesus for thirty coins (laisse 347). The Franks who defeat these Judas-like forces do not engage in mere warfare, nor do they pursue the financial rewards that allegedly motivate Jews and Saracens. As true Christian heroes, these noblemen seek only to righteously avenge Christ’s death by slaughtering the contemporary equivalents of Christ’s killers.
The portrayal of Saracens as quasi‐Jewish killers of Christ enables Christians not only to glorify those who defeat them in battle but also to inspire new military campaigns. The Muslim chronicler Izz al‐Din Ibn al‐Athir provides a vivid example of such rhetoric when recounting what happened after Muslim forces retook Jerusalem in 1187.
Ibn al‐Athir, perhaps drawing on firsthand knowledge, reports that the city’s patriarch aroused fellow Franks to avenge this loss by making a picture of Jesus that “portrayed Christ (peace be upon him) along with an Arab, depicted as beating him. They put blood on the portrait of Christ and said to the people, ‘This is Christ with Muhammad, the prophet of the Muslims, beating him. [Muhammad] has wounded and slain him.’”
Ibn al‐Athir inserts the customary Islamic honorific for Jesus, whom Muslims revere as a messenger of God, but provides no further editorial commentary: he trusts that his Muslim audience will recognize the preposterous nature of the allegation that Muhammad killed Christ. Preposterous though it is, this propaganda builds on longstanding Frankish rhetoric associating Muslims with Christ’s persecutors, and it provides powerful religious motivation for Christian warriors to avenge the maltreatment of their God.
Ibn al‐Athir credits this propaganda with raising “more men and money than there would be any way of counting” toward what academic historians call the Third Crusade; “even the women,” he emphasized, “answered the call in great numbers.” If Ibn al‐Athir is reliable, he provides valuable evidence regarding the broad impact of religious rhetoric designed to appeal to a specific subset of Christian society, namely fighting men.¹²
(Emphasis added in all cases.)
Although some Christian readers may cringe reading this — as if watching an old and unpleasant home video of oneself — my overall intention here is not to induce guilt but to reduce the quiet assumption that we have that Jews were always alone in suffering oppression. On the contrary, there was times and places — Iberia, the Levant, Tsarist Russia, & alibi — where Jews and Muslims suffered side-by-side at the hands of xenophobes. Indeed, I would argue that we cannot fully understand anti-Judaism unless we have at least some grasp of Islamomisia as well.
See also: Interview with David M. Freidenreich.

Jewish advocacy for a one-state solution represents a form of Zionism that centers Jews in Palestine's future. Instead, anti-Zionist Jews must aim to accelerate the dismantling of Zionism both in Palestine and worldwide.