Some scholars have reached the conclusion from this verse [Al-tawba 12] that it is obligatory to kill anyone who defames the religion, as he is a Disbeliever [Kafir]. And defaming [“stabbing”] means attributing to it what is not befitting of it, or raising frivolous objections against matters of the religion, when the veracity of their foundation and the integrity of their rulings have been affirmed by definitive evidence.