Actually, gah - this is why it's so hard to argue faith - free will cannot be proven, but there are data proofs that correspond emotions with brain chemistry - you can counter that with simply saying "god made it" but like you said, if god's mind is unreadable, how do you know if he made it or not?
Again, I agree that if such a being existed, I can't fully understand his intent - as a child to an adult - but even a child knows that it is simply impossible to contradict oneself and still be correct.
And with this, I agree 100%