Who are the Disbelievers?

Anyone who disbelieves in the complete truthfulness of The Qur'an or
even one single ayat (verse) from the Qur'an, is a disbeliever and is
not abrother or sister to themuslims.
Often as Muslims, we do not fully understand verses, butthat is not
the same as disbelief. If, however, we deny the truth of what is
plain, or claim disbelief or corruption in any ayat of the Qur'an, we
are calling the Words of Allah, swt, a lie and are in disbelief,
thereby nullifying our Islam, i.e. becoming disbelievers.
The Noble Qur'an Al-Maa'idah 5:86
But those who disbelieved and belied Our Ayât (proofs, evidences,
verses, lessons, signs, revelations, etc.), they shall be the dwellers
of the (Hell) Fire.
The Noble Qur'an Al-'Imraan 3:85
And whoever seeks a religion other than Islâm,it will never be
accepted of him, and in the Hereafter he will be one of the losers.
In addition, Ibn Taimiyah said, "[The following is] a disbeliever:
Whoever believes that churches are the houses of Allaah in which He is
worshipped or who thinks that what the Jewsand Christians do are valid
acts of worship of Allaah and obedience to Him and His Messenger, or
loves or approves of what they do, or aids them in having such places
and establishing their religion, and he does so thinking that is a way
of getting closer to Allaah or worshipping Allaah." He also stated,
"Ifsomeone believes that visiting the Jews and the Christians in their
places of worship is an act that brings him closer to Allaah, then he
is an apostate."
Sect or Denomination?
The call to unity of religions is made by two types of people:
1. Those who are muslims and have formed a sect
Those Muslims whose intentions are to follow the Qur'an and Sunnah
ofthe Prophet saaws and the salaf, know better than to divide
themselvesinto a sect (a dissenting or schismatic religious body;
especially one regarded as extreme or heretical).
*.
"And this Ummah will divide into seventy-three sects all of which
except one will go to Hell and they (i.e. the Saved Sect) are those
who are upon what I and My Companions areupon (i.e. those who follow
My Way and the Way of my Companions.)" [Reported by at-Tirmidhee -
Hasan]
*.
"Verily those before you from among the People of the Book splitinto
seventy-two sects and verily this religion .. . ", and in another
narration, " . . . this Ummah will split into seventy-three sects:
seventy-two will be in the Fire and one in Paradise and that is
theJamaa'ah." [Reported by Abu Daawood - Sahih]
*.
The Noble Qur'an 6:159
Verily, those who divide their religion and break up into sects (all
kinds of religious sects), you (O Muhammad SAW) have no concern in
them in the least. Their affair is only with Allâh, Who then will tell
them whatthey used to do.
2. Certain denominations of Non-muslims
Of these non-muslims, there are:
A. Certain christian groups and other religions
*.
The Noble Qur'an 2:120 - Never will the Jews nor the Christians be
pleased with you (O Muhammad Peace be upon him) till you follow their
religion. ...
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The Noble Qur'an 68:9 - They wish that you should compromise (in
religion out of courtesy) with them, so they (too) would compromise
with you.
B. People who call themselves Muslims but associate partners with
Allah, swt. These people are kaffirs because they nullify their
professment of"Laa ilaha ilAllah" through major shirk .
*.
Anyone who has a fundamental belief thata man named Elijah Muhammad
came as a Messenger after Prophet Muhammad, saaws, is not a Muslim.
Neither is anyone who believes that a man named Mohammed Fard was God.
People who hold such beliefs do not have a minhaj (methodology) for
making determinationsin faith that is based onQur'an and Sunnah.