A large archive related to these people was stored in the Cairo Genizah.
One ruler with this characteristic rode his horse into the sea after being attacked by the Kingdom of Aksum prior to the Year of the Elephant. A large archive related to these people was stored in the Cairo Genizah. One tribe (*) with this characteristic was massacred after their defeat at the Battle of the Trench. That tribe was the Banu Qurayza. One group with this characteristic lives on the Tunisian island of Djerba, and the seat in the Iranian parliament reserved for these people is currently held by Siamak Moreh Sedgh. One non-Mongol horde with this characteristic maintained a namesake "Pax" among neighboring steppe peoples. People with this characteristic met with the Jesuit missionary Matteo Ricci upon his arrival in Kaifeng. For ten points, name this characteristic shared by Joseph Dhu-Nuwas and Khans Aaron and Benjamin of Khazaria.
One ruler with this characteristic rode his horse into the sea after being attacked by the Kingdom of Aksum prior to the Year of the Elephant.
  Jew ishness (or Judaism) (or less awkwardly-phrased things relating to Jews)