Dr. Shah-Kazemi opens this article with the narration of Prophet Muhammad’s invitation to a group of Christians in 631 CE to perform their rites in his own mosque. This remarkable event was reported by Ibn Ishaq and others. As Dr Shah-Kazemi says “one observes here a perfect example of how disagreement on the plane of dogma can co-exist with deep respect on the superior plane of religious devotion”. This is one of a series of acts of the Prophet which indicate the sanctity of religions which preceded Islam. Based on a reading of certain Qur’anic verses on the subjects of salvation, the Umma and religion, the author argues that “the essence of religion is immutable, only its forms vary”. He goes on to state that ”the universal message of the Qur’an invites the Muslim to manifest respect, tolerance and reverence for that same essence which resides at the core of all the revealed religions of mankind”.
via The Institute of Ismaili Studies – Pluralism and the Qur’an.