As for refraining from reviling and cursing him, this rests either on the view that the sinfulness warranting his being cursed has not been established, or on the view that a particular sinner should not be singled out for cursing, because doing so is either forbidden or discouraged.
It is authentically reported in Sahīh al-Bukhārī, on the authority of ‘Umar, in the account of “Himār,” who repeatedly drank wine and was flogged for it, that when one of the Companions cursed him, the Prophet, may Allah bless him and grant him peace, said:
“Do not curse him, for he loves Allah and His Messenger.”
He also said:
“Cursing a believer is like killing him.”
This is reported by both al-Bukhārī and Muslim. Yet it is also authentically established that the Prophet, may Allah bless him and grant him peace, cursed wine and those who drink it. Thus, the Prophet cursed wine-drinkers in general, while forbidding, in an authentic hadith, the cursing of this particular individual.
Similarly, the scriptural threats of punishment apply generally to those who devour orphans’ wealth, adulterers, and thieves. We do not, on the basis of these general texts, declare any particular individual to be among the people of the Fire, since a stronger countervailing factor may prevent the threatened consequence from following: repentance, good deeds that erase sins, afflictions that expiate them, accepted intercession, or something else, as we have explained elsewhere. These, then, are three grounds for refraining from cursing him.
Some of those who curse him hold that refraining from doing so is like refraining from other permissible forms of unnecessary speech—not that cursing him is discouraged.
As for refraining from loving him, this is because special love is reserved for the prophets, the steadfastly truthful, the martyrs, and the righteous, and he is not one of them. The Prophet, may Allah bless him and grant him peace, said:
“A person will be with those whom he loves.”
Anyone who believes in Allah and the Last Day would not choose to be with Yazīd or with other kings like him who are not just.