ما حكم سب أو شتم الديانات الأخرى، وسب الديانة المسيحية؟

It is not permissible to insult the revealed religions. As for non-revealed religions, such as paganism, it is permissible to insult them and describe their followers as polytheists and disbelievers, unless this leads to insulting Allah, Islam, or the Prophet (peace be upon him), due to the Almighty's saying: "And do not insult those they invoke other than Allah, lest they insult Allah in enmity without knowledge."