The Jew-Muslim co-conspiracy trope ended only when Jews became assimilable.

Evidence

The purported relationship between Jews and Muslims as co-conspirators existed in the Christian imaginaire for centuries. It was not ultimately extinguished until Jews were finally considered capable of assimilating—something that didn’t take place until the late twentieth century and that has yet to happen for Muslims. — Sophia Rose Arjana, Muslims in the Western Imagination, 171

Categorization

• QUESTION: What does ‘assimilable’ mean as the criterion that finally extinguished the Jewish half of the fused monster—and why has it not been extended to Muslims? Useful for the reader’s inquiry into how the monster persists.
• SEED: Angle: the monster category dissolves not by refutation but by the target group’s admission into the in-group—a test for whether Muslim vilification will ever end on these terms.