Can a kafir be called Kafir?
Answer
(Fatwa: 39/39=J)
There is no wrong in saying kafir to a kafir if he does not dislike it, but it is wrong if he dislikes:
لو قال لیھودی او مجوسی: ‘یاکافر’ یاثم ان شق علیہ، کذا فی القنیۃ (الھندیۃ: 5/348)
Yes, it can be called in case of need.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband