Egypt bombing: Who are the Sufis and why does IS see them as threatening?

Many Muslims, not just militants, consider shrine devotion as superstitious and idolatrous

This is not the first time a cherished Sufi site and Sufi worshipers have been the target of extremists. Earlier this year, in February, a bomb exploded at the tomb of a Sufi saint, Lal Shahbaz Qalandar, in southeastern Pakistan. In 2016, combatants of the so-called Islamic State distributed images of the supposed execution of a Sufi teacher. The same year, the Pakistani Taliban murdered a popular Sufi singer of Pakistan, Amjad Sabri. In 2010 the tomb of another Sufi saint Data