Atheism is unstoppable.

[Belacqua]

Many theists, college graduates or not, do have good critical thinking skills, except for the one blind spot where their religious convictions lie.

Other than assuming that people with good critical thinking skills will agree with me, do we have any way of knowing that theists believe due to a blind spot? Or is it that critical thinking has led them to a different conclusion from the one I have? 

I can see how college would give literalists an alternative view that would help them out of their simplistic beliefs. But this is more due to additional facts, and not necessarily improved critical skills. New exposure to an environment in which atheism is OK, or even approved of, seems likely to account for many de-conversions.

College helps to hone one's critical thinking, no doubt

Um... I doubt. It will in some cases. In a lot of cases, not. 

I just want to avoid begging the question. "He must have good critical skills because he's an atheist." And how do we know that atheists have good critical thinking skills? "Because they're atheists."