AsslaamuAlaikum,
It is really very much shocking to know that brothers and sisters are totally unaware of one of the biggest fitnah of our time. Yes, one of the biggest fitnah. I can understand that the Muslims in the west dont have enough information about this issue. I strongly recommend the following link for carefully study:
http://www.irshad.org/qadianism.php
Some part of text from above mentioned website:
What is Qadianism
The "Ahmadiyya Movement in Islam" (called by Muslims everywhere as "Qadianism") was established, in 1889, by Mirza Ghulam Qadiani (1835 - 1908) in a small Punjabi village of India. Mirza Ghulam Qadiani’s family were in the service of the British colonial powers and, to his dying days, Mirza Ghulam openly declared his allegiance to the British imperialism. In fact, the culmination of his service to foreign power was his declaration that resistance to oppressors (Jihad) -- as ordained in the Holy Quran by God -- had become unIslamic!
Mirza Ghulam Qadiani’s life was laden with contradictory and anti-Islamic claims. In 1880, he declared himself to be only a Muslim writer; in 1885, he announced he was a revivalist (Mujaddid); in 1891, he claimed to be the Promised Mehdi and the Promised Messiah; and in 1901, he pronounced himself a prophet of God! Facing an open and strong opposition by Muslim Scholars and religious leaders for this blasphemous declaration and other teachings which belittled Jesus Christ(pbuh) and contradicted the Quranic revelations, he also announced that he was the second and improved coming of the Prophet Muhammad(SAW) with authority to reinterpret the Holy Quran at his pleasure! Not happy with mere prophethood, in 1904, he declared himself the Krishna (the Hindu Lord). Obviously, like an unethical modern-day politician, he was trying to appeal to all uneducated segments of the public in India!
Fortunately, the Almighty Allah(SWT), time and time again, exposed Mirza Ghulam Qadiani's falsehood through his own statements and so-called prophecies. Even many of his own family members were aware of his treachery and openly opposed his anti-Islamic teachings. Mirza Ghulam Qadiani finally died by intervention of the Almighty Allah and as the result of religious prayer challenges (Mubahala), in 1908.
Since the death of Mirza Ghulam Qadiani, his heirs -- the leaders of the Qadiani organization ("Ahmadiyya Movement in Islam") -- have been extremely busy trying to clean up his image. Backed by seemingly unlimited support they receive from their anti-Muslim allies, they have been promoting falsehood and deception through the media. They have even resorted to removing some of most controversial writings of Qadiani leadership -- which had become a source of embarrassment to them -- from circulation. Their partial English translation of their original text has been heavily edited to exclude all controversial and anti-Islamic sayings of their cult leaders. Obviously, they themselves realize the true nature of their "Ahmadiyya Mission".
The goal of the "Ahmadiyya Mission" is, and has always been, to confuse uninformed Muslims, divide the Ummah, prevent resistance to oppressors (Jihad), and provide an alternative to non-Muslims who find the message of Islam appealing. Quite cunningly, they do so by using Islamic terminology and teachings, and hiding the controversial writings of their founders. Today, only the most learned Muslims are able to attend one of their functions and realize that their brand of Islam is a form of Kufr (disbelief). Even when their leaders mention the Kalima (I bear witness there is only one God and Muhammad is his messenger), they are referring to their founder who proclaimed himself to be (God forbid) the second improved coming of the prophet Muhammad(SAW) and not to the true Prophet(SAW) of Allah(SWT).
Muslim brethren everywhere should not be confused by Qadiani leadership's superficial use of Islamic concepts to promote their cult. Our beloved Prophet Muhammad(SAW) and the four Khalifah also faced such false prophets. Of particular interest is the claim by an Arab, named Musailama, to prophethood, during the latter part of the life of the Prophet(SAW). Although he simply claimed co-prophethood with the Prophet Muhammad(SAW) of Arabia and did not belie any other teaching of the Holy Quran, he and all of his mislead followers were declared out of the fold of Islam, by righteous believers. Under the leadership of Hadrat Abu Bakr Siddique(RA) and with the unanimous consensus of all the companions of the Prophet Muhammad(SAW), a victorious war was waged against Musailama for using Islamic concepts and claiming prophethood. This should indeed be sufficient evidence to declare the Qadianis as non-Muslims.
In 1974, after an exhaustive examination of all the evidence presented for and against the Qadianis, the Muslim World League (Rabita Alame Islami) -- which represents all religious scholars from every Muslim country of the world -- passed an unanimous resolution declaring the Qadiani Movement and its leadership out of the fold of Islam. Indeed, "Ahmadiyya Movement in Islam" is a man-made organization with no divine authority or guidance.
Say: "O ye men! Now Truth hath reached you from your Lord! those who receive guidance, do so for the good of their own souls; those who stray, do so to their own loss: and I am not (set) over you to arrange your affairs."
(The Holy Quran, Yunus, 10:108)
How do Qadiani (Ahmadi) Missionaries Operate?
The followers of Mirza Ghulam Qadiani refer to themselves as "Ahmadi Muslims" and pretend to belong to the Sunni school of thought (individuals who follow the example and teachings of Prophet Muhammad). They approach individuals, who have never heard of Qadianism (Ahmadiyyat), and, relying on their financial and political resources and baseless missionary arguments, try to convert Muslims into Qadianism.
They try to acquire new members by relying on traditional missionary techniques:
Misrepresenting the holy Quran, hadith, Muslim scholars, and historical records;
Attempting to discredit devote Muslims and alienating their victims from the ummah;
Preaching the appealing message of Islam at a ritualistic level;
Misleading those who have not heard of Islam or Mirza Ghulam Qadiani;
Confusing those with a very elementary knowledge of Islam;
Building prayer halls, schools, and missionary houses to earn the trust of the needy.
They recruit new missionaries by:
Bribing and buying the services of officials;
Offering financial and material incentive to weak individuals;
Funding the work and life of missionary workers in the West.
Followers of other faiths, after having unsuccessfully attempted the missionary method of attacking the Muslims, seem to have abandoned their ways and be now supporting the Qadianis (Ahmadis) with their work! Why would they feel so strong about supporting these "self-professed Muslims"?
Naturally, except for the elite in the Qadiani (Ahmadiyya) Mission and those who follow the cult in way of loyalty to the way of their fathers, not too many individuals are aware of the core doctrine of Qadianism (Ahmadiyyat). For over a century now, the Qadianis (Ahmadis) have refused to make a complete translation of their books available in other languages. While they boast about having distributed their false translation of the holy Quran in dozens of languages, they have refused to translate the writings of their own founder in any other language (original writings are mostly in Urdu, Persian, and Arabic)! What are they hiding?
The enemies of Islam and the modern colonialists trying to enslave the Ummah are afraid of the resurgence of Islam; they fear the unity of Muslims and their spirit of Jihad. They know too well that a Muslims converted to Qadianism (Ahmadiyyat) is a blindly obedient person who will never move against the will of his/her masters. These unbelievers will stoop to anything to achieve their goal and certainly have no qualms about condemning many souls to hell, in the process.
Every Muslim should strive very hard to spread the true word of Islam and to expose the hypocrisy of the Ahmadiyya Mission Against Islam.
Wasslaam,
VE