@Meridis but their depiction shown that they still care about their livelihood or at least their leader's. It's not that they are grasping at any purpose, it's just that they think too highly of themselves. Schtorm was smart enough too leave what basically is a walking nuke alone, but the others refuses that there's any creature that is equal or more powerful then their leader. The point of their plan is not to make him into a demon, but to erase any possibility of him being a threat to their leader.