Though reading the Bible twice cover-to-cover cured me of being a Christian, it was exposure to apologetics and logic that tipped me over to atheist about 15 years later. Understanding burden of proof was a big part of that, along with the realization that there is no such thing as good apologetics. I don't know exactly when it happened, one day I realized I had stopped believing in God entirely.
I'm not anti-Christian. I'm anti-stupid.