It is evident that insulting someone results in the insult being returned, whereas offering compliment results in the compliment being reciprocated. Thus, if you tell a man that his father is a noble and righteous person, he will never respond by calling your father wicked or evil. Instead, he will please you with the choicest words and praise your father in the same manner as you praised his. In fact, he will praise him even more highly. However, if you use insults, he will respond to you in the same fashion.
Likewise, those who insult as-Siddiq and al-Faruq are in fact insulting ‘Ali and injuring him. They are also disregarding the truth. For, if you call Abu Bakr an infidel, you are provoking those who love him to say that ‘Ali was a greater infidel. Thus, you do not merely insult Abu Bakr, you insult ‘Ali as well, and exceed all limits. While you would not insult a person’s father lest he insult your father, nor would you insult the mother of your enemy, you do not seem to care about the honour of the household of the Prophet (sas), nor do you try to prevent it from being the target of retaliatory attacks. You do not consider these terrible consequences, despite calling yourself Shiite and claiming to love them. O enemy of the household of Allah’s Messenger! O hypocrite! It is you who bear the sin for this offence.