::Disagree. Revue des Études Juives is RS, and not one doubts Moshe Gil's qualifications as an Israeli éminence grise in the field of Arabic and Jewish scholarship on the ME. Gil wrote that aged 90 of course and certainly has a defined and partial position, clear from his History of Palestine. But these are not considerations which should influence us. We are not dealing with 'facts' but with interpretations, and the only thing that matters is determining which view has the scholarly consensus in order to calibrate this material (I think it is a minority view, but that needs checking) according to WP:Weight.  Compare Peter Golden's  'The Conversion of the Jews to Judaism,' which takes this as uncontroversial. Golden has a far broader grasp of comparative and contemporary scholarship.