What is the legal criterion for the issue of boycotting? For people are either excessive in it or negligent in it?

The questioner : Yes, my Shaykh, regarding the Shari'ah boycott, what is the criterion for the Shari'ah boycott? These days, people of sins and open sinfulness have multiplied in every land, so people have differed regarding the Shari'ah boycott. Some are strict in it, to the point that they order the boycotting of one who leaves some of the recommended practices (sunnah) and are severe in that. Others are lenient, to the point that they are negligent regarding one who curses the Prophet (peace and blessings be upon him) or curses the Qur'an. So what is the legal criterion for that, or what is the public benefit in that, my Shaykh?

The Shaykh : First, what we believe and testify to Allah with is that the boycotting in question is a Shari'ah educational means intended to educate the boycotted person for the sake of Allah the Exalted because of his disobedience. If that is the case, the matter differs from person to person and from country to country. The one who wants to boycott his Muslim brother must look at the outcome: will this boycott bring the intended benefit of the Shari'ah boycott to the boycotted person, or not? If he is convinced that the benefit is expected, he should boycott; otherwise, he should not.