Ali (ra) charred Abdullah bin Saba to death. Or did he?
If Ali (ra) was one of those who migrated with the Prophet (sws), left his home to support the Prophet (sws), if he was really as pious and knowledgeable and merciful as he is reported to be---then I must say that the story of Abdullah bin Saba is a total hoax and fabrication. To burn people is only Allah’s prerogative.
I am giving Hadith and History both and leave it to you to decide what is the truth and what is false?
Some Zanadiqa (atheists) were brought to 'Ali and he burnt them. The news of this event, reached Ibn 'Abbas who said, "If I had been in his place, I would not have burnt them, as Allah's Apostle forbade it, saying, 'Do not punish anybody with Allah's punishment (fire).' [Chapter Dealing with Apostate : Bukhari].
The Prophet Mohammad (PBUH) once passed by a burnt anthill. When he saw it he asked, “Who has burnt it?” When he was told, he said, “Only the Lord of Fire has the right to punish with fire." [Sunnan Abu Dawud].
Ibn Jareer Tabari in his Histroy says:
One morning a Khariji name Abd-al-Rahman ibn Ibn Muljam Muradi, attacked Hadhrat Ali [May Allah be pleased with him] when he [May Allah be pleased with him] was leading the Fajr Prayers, and stabbed him with a poisoned sabre.
"Who struck me?" he asked Hazrat Hassan [May Allah be pleased with him]. They at once brought the cruel assassin into the Khalifas presence. Hazrat Ali [May Allah be pleased with him] recognized his assailant, for Ibn Muljam had once worked for him as a servant. It was during that time that the Hazrat Ali [May Allah be pleased with him] had said to Ibn Muljam,: "Ibn Muljam, my end is in your hand."
On that occasion Ibn Muljam had said: "Far be it from me, O Imam. Let my hand wither if I should do such a thing." He had then begged to be put to death.
Hazrat Ali [May Allah be pleased with him] asked Ibn Muljam: "What have I done to you, Ibn Muljam; have I touched your honor, property or person?" Overcome with fear and dread, Ibn Muljam managed to say: "By no means; only the judgement belongs to Allah alone.
Khalifa said: "Your words are true, but your intention is false."
They took Ibn Muljam away and put him in jail under surveillance. Turning to Hazrat Hasan [May Allah be pleased with him] the Khalif said later: "If I recover from this wound it will be my business to deal with him. If I die, kill him with a single stroke of the sword, so that the divine law is carried out. Take care not to kill him with cruelty or torture, for I once heard your grandfather Muhammad (Sall Allahu alaihi wa Aalihi wa Sallim) say: "Do not kill even a rabid dog with torture and pain."
Hazrat Ali [May Allah be pleased with him] could not survive that injury and passed away. Hazrat Hassan and others as mentioned by Tabari killed Ibn Maljam not with one single stroke but very slowly, they cut his hands, then legs and they poked his eyes with hot Iron Rod and after cutting him into many pieces then had Ibn Maljam burnt to ashes.