Illustration: New York Times / Serial
Let’s begin with the mystery. In 2014, an anonymous whistleblower leaked to the British press a photocopy of what appeared to be a secret communiqué outlining an Islamist conspiracy to take over schools in the English city of Birmingham. “Operation Trojan Horse,” as the letter referred to it, would systematically push non-Muslim school administrators out of power and replace them with people who would operate the schools according to strict Islamist principles.
The inflammatory document would…