[malakhi]

her·e·sy
n. pl. her·e·sies

An opinion or a doctrine at variance with the speaker's religious beliefs.

cult mem·ber
n. pl. cult mem·bers

One who holds an opinion or a doctrine at variance with the speaker's religious beliefs.

[D-fendr]

Impiety, n.: 
Your irreverence toward my deity. 
[Ambrose Bierce]