Applying the description of kufr upon the Jew and the Christian
Is it permissible to declare a Jew or a Christian to be a kaafir (disbeliever)?
It is permissible for a Muslim to say that a Jew or a Christian is a kaafir because Allaah has described them with this attribute in the Quraan. And this is known to the person who reflects upon the Quraan. From this is His - the most High – statement:
Indeed those who disbelieved (kafaroo) from the People of the Book and the Polytheists are in the Fire of Hell to reside therein forever. They are the worst of all Creation. (al-Bayyinah 98:6)
And the People of the Book are the Jews and the Christians.
Permanent Committee for Research and Verdicts
Shaykh `Abdul-`Azeez Bin Baz
Shaykh `Abdullah bin Ghudayaan
Shaykh `Abdullaah bin Qu`ood
Shaykh `Abdur-Razzaaq al-`Afeefee
Question 2 from fatwa number 4252
P143 Volume 2 of the fatawa of the Permanent Committee
Translated by Abu Abdir Rahmaan ibn Najam