Dr. Craig is a liar.

[Mister Agenda]

It would be like me saying to you:  "Well RR, if you can't explain the mathematical equations behind special relativity to me then I don't have to believe that gravity exists."  

Kind of silly, don't you think?

Except for when I'm being Poe, and demanding that the same requirements that others put forth they hold up to as well. I don't believe that we need to understand something in order to believe it. 

I'm just asking for the reasons that this claim is being made.   Then I will compare the reasons with what others say.  I think that the principle of causality is fairly foundational to science, and that the reason for denying it is more ideological than anything.

Causality is something we are aware of because we observe it in the universe. It may or may not apply TO the universe. Assuming that what is true IN the universe is true OF the universe is a fallacy of composition, like concluding that a wall made of unbreakable bricks must be unbreakable.