SHAFAQNA (Shia International News Association) – The Grand Ayatollah Seyyed Saeed Hakim answered a question regarding insulting others and backbiting.
Question: Is it allowed to insult, curse and backbite the opponents or Naasebi?
The Grand Ayatollah Hakim: It is not right for a believer to insult and backbite in the absence of others especially if it causes trouble.