William Lane Craig diagnosed.

[wiploc]

Dr. Craig suffers from the Dunning–Kruger effect:

https://en.wikipedia.org/wiki/Dunning%E2...ger_effect

This cognitive bias is when a, "relatively unskilled persons suffer illusory superiority, mistakenly assessing their ability to be much higher than it really is."

The bias was first experimentally observed by David Dunning and Justin Kruger of Cornell University in 1999. They postulated that the effect is the result of internal illusion in the unskilled, and external misperception in the skilled: "The miscalibration of the incompetent stems from an error about the self, whereas the miscalibration of the highly competent stems from an error about others."[1]

Dunning and Kruger proposed that, for a given skill, incompetent people will:[4]

• fail to recognize their own lack of skill
  
• fail to recognize the extent of their inadequacy
  
• fail to accurately gauge skill in others
  
• recognize and acknowledge their own lack of skill only after they are exposed to training for that skill
  

First, an example of Dunning Kruger syndrome, after which I'll disagree with your diagnosis of Craig. 

I knew this guy who worked as a carpet cleaner.  He was an adult, but he was never going to grow up.  That is, he had a child's knowledge and a child's maturity.  So I was surprised, one day, when he announced that he was going to be promoted to crew chief. 

How could that be?  I was skeptical, but I thought it would be tactless to ask "WTF" or "Who could be stupid enough to promote you?"  So I settled on, "Why are you going to be promoted to crew chief?" 

He answered, "Because I don't like taking orders." 

So that's Dunning Kruger syndrome in action.  It applies to my carpet cleaning friend, but I can't see applying it to William Lane Craig. 

Craig is smart.  He passes for smart, which requires some smarts.  He wins debates (not always, perhaps, but pretty often) with people that we know are outstandingly smart.  He's a great debater.  He does research and publishes articles.  He traffics in abstruse topics and acts comfortable with them.  I just don't see him as a stupid man. 

Admittedly, he says a lot of stupid things, but he's saying them to his followers.  Being stupid himself is not the same as treating his followers as stupid. 

I can't imagine that he hasn't had his errors pointed out to him again and again, over a period of years.  If he doesn't correct himself, it's not because he doesn't understand.  It's because his followers don't understand. 

Craig isn't stupid.  He just says stupid things because they work.