From The Life and Times of Bruce Gerencser:
In recent years, several movies marketed to Evangelicals have featured erotic scenes of Evangelical revivalism ravishing atheism. Movies such as God is Not Dead are built around the notion that the Christian gospel has the power to brings atheists to their knees. Never mind the fact that these Evangelical fantasies are about as real as the scenes found in countless porn movies. While I can point to countless Evangelicals who are now atheists, rare are atheists who become Christians. When people tell me that they were atheists before they embraced the wonderful, matchless grace of Jesus, I question them as to what they really believed. Most often these former atheists were not atheists at all. At best, they were anti-theists or indifferent to religion. These atheists-turned-Christians wrongly assume that not believing in the Christian God means the unbelievers are atheists. This simply is not the case.
Most atheists I know can give numerous reasons for why they are atheists (or agnostics). Most of the atheists-turned-Christians I have met couldn’t explain atheism if their life depended on it.