From what I've seen, they're some kind of amalgamation of flesh, and something far more evil. Alive in a way - less creature and more tumor, indolent and lazy to the point they need a constant influx of slaves, cruel to the point of insanity and so genetically damaged that they need fresh new genetic material, or their very physiology begins to crumple.
I’d say they’re people.
You can say that the sky is red and the moon is made of cheese too. Words aren't spells and devil worshippers of any variety have no humanity.
From what I've seen, they're some kind of amalgamation of flesh, and something far more evil. Alive in a way - less creature and more tumor, indolent and lazy to the point they need a constant influx of slaves, cruel to the point of insanity and so genetically damaged that they need fresh new genetic material, or their very physiology begins to crumple.