The crucifix is an implement of torture and execution, upon which the titular Christian god was executed to fulfill a blood oath. Executionists, torturers, blood magicians, nailers, death cultists, the forsaken (Psalm 22)…

Being shephered by a higher authority is also a common theme. Sheep is right there, although some actually use that directly.

Another common theme is the second arrival of their god, starting the end of the mortal realm and the death of all mortals. Death cultists again, apocalyptics, doomsdayers…

There’s lots of heinous things in their book, but most reject them or are unaware. You could call out lots of things there.