A Moderate Shia Scholar says Tabarra To The Level of Character Assassination is Forbidden

The Shia Scholar quotes Imam Jafar as Sadiq (as) who forbade shias from the level of Tabarra where its forms into character assassination. Those who do extreme Tabaara are the open enemies of Ahlul Bayt. In fact if a shia curses the opponents Imam and the opponent curses the Imams back the shia will get the sinned and not the opponent. We all are aware of how the shia attack the sahaba, and retaliation the 12th imam is attacked by some sunnis. Therefore in the end only the shias are getting sinned and proving themselves to be the enemies of Ahlul bayt.

This is what the shia scholar stated above in the youtube clip.