It is not sufficient to be considered a Muslim to say the Kalima and at the same time hold the beliefs of the Aga Khani sect. The followers of this sect are undoubtedly disbelievers and it would be a heinous sin to marry from any of them. The following are some of their deviations:

1, They worship the picture of their Imam Aga Khan.

2, Their Bismillah is different to the Bismillah of the Muslims.

3, The method of performing their Salah has no basis in the Qur'an and Hadith but rather is in violation of the sacred sources.

4, Fasting is restricted to fasting of the eyes, mouth and hands.

5, Haj is for them is to visit their Imam.

These and other beliefs and practices are a denial of that which is firmly established in the Religion of Islam, as taught and transmitted by the last Messenger Muhammad (peace and blessings be upon him) and consequently leave a person a disbeliever. Fataawa Haqaniyya, vol.1 p.385.