Religious fanaticism

strictest stream of the Orthodox Judaism faith

extreme or radical form of Islam

uncritical devotion to a religion

essay by Voltaire

Hyperreligiosity (also known as extreme religiosity) is a psychiatric disturbance in which a person experiences intense religious beliefs or episodes that interfere with normal functioning. Hyperreligiosity generally includes abnormal beliefs and a focus on religious content or even atheistic content, which interferes with work and social functioning. Hyperreligiosity may occur in a variety of disorders including epilepsy, psychotic disorders and frontotemporal lobar degeneration. Hyperreligiosity is a symptom of Geschwind syndrome, which is associated with temporal lobe epilepsy.