The Ismā‛īlīs are a sect of the Shī‛ī branch of Islam. They are regarded by many in the west today as epitomizing Islamic 'gnosis', and there is no denying the similarities between their beliefs and those of the more esoteric versions of Judaism and Christianity. They are considered to be terrible heretics, however, by many orthodox Muslims, both Sunni and Shī‛ī, and have been subject to awful persecution at different times in their history.