According to Christians, the decision to reject God is indicative of a deep defect in the nonbeliever’s moral and rational faculties.
That's a new one to me. I find the whole construct a series of baseless assumptions. I am suspicious of the use of the word "defect". Is the implication here to accuse Christians of thinking of unbelievers as being "retards"? Christians believe that there are wise and unwise decisions.
Statements 8-11 are circular reasoning. Just like: "A person would have to be crazy to go on a murder rampage. He must be innocent by reason of insanity because he went on a murder rampage."
Rational or irrational decisions cannot be broken down into a decision tree that applies to everyone. Decisions are determined more by an indivual's world view and value system than any supposed rationality. Any salesman can tell you that most decisions are made on the basis of emotions rather than logic.
What is there is, is a lot of philosophical reasonings, but nothing remotely connected to Christian thought. Straw man burning.