Kaafir comes from the word Kafara which means “not believe”. The West is known to translate Kaafir as “Infidel”, This would be wrong. According to the Oxford Dictionary infidel means:

Noun: A person who has no religion or whose religion is not that of the majority.
Adjective: Adhering to a religion other than that of the majority.

One who disbelieves in the truth even after enough clear proofs has been presented to him.

Jews, Christians & Sabians

Jews, Christians & Sabians:
Many Muslims consider Jews, Christians & Sabians to be Kaafir, this idea is an extremely ignorant crime. They are called “The People of The Book” which refers to those who received the message and guidance from God. e.g. The Jews received the “Law” through Moses (pbuh), the Christians received the “Gospel” through Jesus (pbuh) and the Muslims received “Quran” through Muhammad (pbuh).

Some of the mentions in the Quran:

“Lo! Those who have received the Scripture (The People of the Book) know that (this revelation) is the Truth from their Lord” (Quran 2:144)

“The People of the Book know this as they know their own sons; but some of them hides the truth which they themselves know” (2:146)

“Those who hide the clear proofs We have sent down, and the Guidance, after We have made it clear for the People of the Book, on them shall be God’s curse” (Quran 2:159)

“The People of the Book, after the clear proofs came to them, did not fight among themselves, except for their own selfish motives” (Quran 2:213)

“Truly, the religion of God is Islam (submission to His will). The People of the Book did not separate except, out of mutual jealousy, after knowledge had come to them” (Quran 3:19)

“Say, “O People of the Book, let us come to an agreement between us and you – that we will not worship except The One God and not associate anything with Him and not take one another as lords instead of The One God” (Quran 3:64)

Keep in mind that the People of the Book in these verses also include Muslims.

Uncontacted People

People or communities or groups of indigenous peoples living without sustained contact to neighboring communities and the world community, and includes “indigenous peoples in voluntary isolation”. Again, these people are not classified as Kaafirs due to the fact that the message and guidance of God did not reach them and they are free of blame.

  • “And never would We punish until We sent a messenger.” (Quran 17:15)


Again, atheists can only be classified as Kaafirs only if they disbelieve after clear proofs has been presented to them. An atheist may not believe in God and religion for reasons that are justified to them, but once clear, undeniable proofs has been presented to them, and yet they refuse to believe, only then can they be classified as Kaafirs.


Disbelieve after clear signs are proofs are presented is one of the greatest sin one can commit, thus, we are not to call or insult someone by calling them a Kaafir since no one knows what is in the hearts of men except for God Himself.


Kufr means to “disagree” and it is a sin that can be committed by people of any faith.

For example, when someone doesn’t pray or fast even if he is able, he will be held accountable for the sin of not fulfilling his duty as a believer.

But Kufr is when someone doesn’t pray or fast even if he is able, and disagrees that he has to pray or fast as mentioned in the Quran, then not only is he accountable for not fulling his duty, but also for disagreeing with the guidance sent to him.

repercussions of disbelief

“Fear the Fire, whose fuel is men and stones, prepared for the disbelievers” (Quran 2:24)

“Those who disbelieve and deny Our signs – those will be companions of the Fire; they will abide therein eternally” (Quran 2:39)

“They were covered with humiliation and poverty and returned with anger from God [upon them]. That was because they [repeatedly] disbelieved in the signs of God and killed the prophets without right. That was because they disobeyed and were [habitually] transgressing” (Quran 2:61)

“When there came to them that which they recognized, they disbelieved in it; so the curse of God will be upon the disbelievers” (Quran 2:89)

“How wretched is that for which they have sold their ownselves, that they should disbelieve in that which God has revealed (the Quran), grudging that God should reveal of His Grace unto whom He will of His slaves. So they have drawn on themselves wrath upon wrath. And for the disbelievers, there is disgracing torment” (Quran 2:90)

“God is an enemy to the disbelievers” (Quran 2:98)

“For the disbelievers is a painful punishment” (Quran 2:104)

“And whoever disbelieves in it (The message of God) – it is they who are the losers.” (2:121)

“And whoever disbelieves – I will grant him enjoyment for a little; then I will force him to the punishment of the Fire, and wretched is the destination.” (Quran 2:126)

“Do not disbelieve Me” (Quran 2:152)

“Indeed, those who disbelieve and die while they are disbelievers – upon them will be the curse of God and of the angels and the people, all together” (Quran 2:161)

“The example of those who disbelieve is like that of one who shouts at what hears nothing but calls and cries cattle or sheep – deaf, dumb and blind, so they do not understand” (Quran 2:171)

“Beautified for those who disbelieve is the life of this world, and they ridicule those who believe” (Quran 2:212)

“But if they fight you, then kill them. Such is the recompense of the disbelievers” (Quran 2:191)

⚠️ Warning: Some people may find pictures in this article upsetting

dangers of disbelief

One might wonder the reason behind such brutal punishments for the disbelievers, they should consider and educate themselves about the “Age of Ignorance” and their evil practices, to name a few:

  • Female infanticide
  • Animal abuse
  • Animal & Human sacrifices for their idol gods
  • Gambling
  • Stealing
  • Greed
  • Fornication
  • Murder
  • Warfare
  • Rape
  • Sexual abuse
  • Child abuse
  • Disrespect to parents
  • Public lewdness
  • Public sex & Group sex
  • Torture
  • Cannibalism
  • Sodomy
  • Blasphemy