Perhaps MK's purpose in being here is to deliberately goad us into asserting our skepticism, in order to score more sentient firewood for Iblis. 
More likely, though, is that the existence of overt non-believers destabilizes his worldview in some way, and has led him to obsess about us. I'm getting an image of the Cowardly Lion from The Wizard of Oz, clutching his tail with both paws and chanting "I do I do I do believe in spooks."

More likely, though, is that the existence of overt non-believers destabilizes his worldview in some way, and has led him to obsess about us. I'm getting an image of the Cowardly Lion from The Wizard of Oz, clutching his tail with both paws and chanting "I do I do I do believe in spooks."