Original sentence: "  As mentioned above, some academic scholars think that Banu Qurayza had negotiated with the enemy.On the fate of Banu Qurayza, another academic point of view is that Ibn Ishaq, the first biographer of Muhammad, supposedly gathered many details of the incident from descendents of the Qurayza Jews themselves.These Jews allegedly embellished or manufactured details of the incident by borrowing from histories of Jewish persecutions during Roman times.Watt, a scholar of Islamic studies, however thinks that this argument "is not entirely convincing.Welch, an scholar of Islamic studies, states that Muslims "discovered, or perhaps became suspected" that the Jews were conspiring with the enemy