I was reading an answer to a question on this site. Here is it : https://islam.stackexchange.com/a/254/51089
The answer states that Ali burnt some people for a reason as :
It is related from ‘Ikrima that ‘Ali burnt some people and that reached Ibn ‘Abbas who said, “If it had been me, I would not have burned them because the Prophet, may Allah bless him and grant him peace, said, ‘Do not punish with Allah’s punishment.’ I would have killed them as the Prophet, may Allah bless him and grant him peace, said, ‘If someone changes his religion, kill him.’”
Is this considered un-authentic by Shia scholars in common ?
P.S.- I'm asking this because it is very opposite and contradictory to the character of Ali that I have read of. Further, I asked a nearby twelver Maulana about this and he refused that Ali can do so; thus, mentioning it as fabricated or for insulting his character. He said that burning alive people had never been a part of Islam (consequently, mentioning that it's a very low, immoral and unjustified form of punishment).
