A Medieval Antidote to ISIS

Even a Muslim who abandoned all religious practice and committed many sins, they reasoned, could not be denounced as an “apostate.” Faith was a matter of the heart, something only God — not other human beings — could evaluate.

.. Aware that irja is its theological antidote, the Islamic State presents it as a lack of religious piety. It is, however, true piety combined with humility — the humility that comes from honoring God as the only judge of men. On the other hand, the Islamic State’s zeal to dictate, which it presents as piety, seems to be driven by arrogance — the arrogance of judging all other men, and claiming power over them, in the name of God.