Apostasy

Apostasy (, ; ) is the formal disaffiliation from, abandonment of, or renunciation of a religion by a person. It can also be defined within the broader context of embracing an opinion that is contrary to one's previous religious beliefs. One who undertakes apostasy is known as an apostate. Undertaking apostasy is called apostatizing (or apostasizing – also spelled apostacizing). The term apostasy is used by sociologists to mean the renunciation and criticism of, or opposition to, a person's former religion, in a technical sense, with no pejorative connotation.

Christians who bowed to external pressure

Calvinist doctrine that the elect will continue in faith until the end, since God’s will cannot be frustrated by humans; those who apparently fall away either never had true faith to begin with, or will eventually repent

rejection of Judaism and possible conversion to another religion

repudiation of the Christian faith