The following verse clearly tells us that there should be no mockery among the believers: “O you who believe! Let not some men among you laugh at others: It may be that the (latter) are better than the (former): Nor let some women laugh at others: It may be that the (latter) are better than the (former): Nor defame nor be sarcastic to each other, nor call each other by (offensive) nicknames: Ill-seeming is a name connoting wickedness, (to be used of one) after he has believed:
And those who do not repent are (indeed) doing wrong.”
Allah tells people to refrain from mocking. Mockery can take many forms: open laughter at personal misadvantures, sly grins, verbal teasing under the pretence of joking, or sidelong glances to convey something which cannot be openly discussed. Such behaviour belongs to the culture of the ignorant and does not befit true believers. The Qur’an tells us that people who indulge in such behaviour will have tosuffer the Fire of Allah mounting on to their hearts. “Woe to every (kind of) scandal-monger and backbiter, who piles up wealth and keeps on counting it, thinking that his wealth would make him last for ever. By no means! He will be sure to be thrown into the crushing Fire. And what will make you know what the crushing Fire is? It is the Fire of Allah kindled (to a blaze), which mounts to the hearts of men:
Surely it shall be closed over upon them, (they will be punished) in columns outstretched.”
It is not possible for a believer to behave in any cynical manner after he knows this clear decree of Allah. Indeed, no believer behaves in that way deliberately. However, if ever a believer slips into that manner, he may be unaware of his wrong conduct and taking it as fun. But whenever he realizes that what he is doing is wrong, he should immediately stop and repent.