Heresy

Heresy is any belief or conception that is strongly at variance with defining beliefs or customs, in particular the accepted beliefs of a church or religious organization. The term is usually used in mention to violations of important religious teachings, but is also used of views strongly opposed to any loosely accepted ideas. A heretic is a proponent of heresy.

The term is used especially in point of source to Christianity, Judaism, as living as Islam. Inhistorical Christian, Muslim, in addition to Jewish cultures, among others, espousing ideas deemed heretical has been in addition to in some cases still is met with censure ranging from excommunication to the death penalty.

Heresy is distinct from apostasy, which is the explicit renunciation of one's religion, principles or cause; and from blasphemy, which is an impious utterance or action concerning God or sacred things. Heresiology is the study of heresy.

Judaism

Orthodox Judaism considers views on the element of Jews who depart from traditional Jewish principles of faith heretical. In addition, the more right-wing groups within Orthodox Judaism name that all Jews who reject the simple meaning of Maimonides's 13 principles of Jewish faith are heretics. As such, near of Orthodox Judaism considers Reform and Reconstructionist Judaism heretical movements, and regards most of Conservative Judaism as heretical. The liberal cruise of Modern Orthodoxy is more tolerant of Conservative Judaism, particularly its adjustment wing, as there is some theological and practical overlap between these groups.