Imaam Maalik (rahmatullah alayh) was asked about those who insult the Sahaabah (radhiyallahu anhu), so he said: “Those who do so are people who intended to criticise Nabi (sallallahu alayhi wasallam) himself, but they are not able to do so, so instead they criticise his As’haab (Companions, (radhiyallahu anhum).” [As-Saarimul Maslool] Imaam Maalik (rahmatullah alayh) said that Allaah Azza wa Jal says in the Qur’aan Kareem: {“He (Allaah) enrages the kuffaar through them (Sahaabah-e-Kiraam radhiyallahu anhum).”} Therefore, whosoever finds fault with (the Sahaabah radhiyallahu anhum), he is a kaafir.” [Al-Itisaam] Imaam Muhammad ibn Yusuf al-Firyaabi (rahmatullah alayh) was asked about someone who insults Hadhrat Abu Bakr (radhiyallahu anhu), so he said: “Such a person is a kaafir.” He was asked, “Is Janaazah Salaah to be performed for him?” He said, “No.” He was asked, “What is to be done with such a person (after he dies)?” He said, “Don’t touch him with your hands. Push him into a hole in the ground using sticks.”
[As-Saarimul Maslool]