Only one question is needed: “Are you a Moslem?” and should be coupled with some investigation if the answer is negative and the applicant speaks Arabic or Urdu or Farsi.
>>”Only one question is needed: “Are you a Moslem?” and should be coupled with some investigation if the answer is negative and the applicant speaks Arabic or Urdu or Farsi.”<<
Add to that list: Pashto, Dari, Bahasa, Russian (or chechen, Nakh, Vainakh), Bahasa Melayu, Turkish, and French, German, etc. (since second generation western-muslim jihadists often aren’t fluent in other languages).