I disagree. Many people claim to be Muslims and don't know the first thing about Islam, if they later say "I was a Muslim and now I am an atheist" it says nothing about Islam at all because they knew nothing about it. The same thing goes for atheism, if someone considers themself an atheist simply because "I haven't really thought about it" and then later becomes a theist because they DID think about it then obviously the fact that they were once an atheist has carries no weight.
Its too simplistic to say that some, in particular AbuY, knew nothing about Islam or atheism. If people do go from atheism to islam or islam to atheism they normally would know something about them. Othewise they would not have a need to move from one to the other and would remain ambivalent.
In fact I would hazard a guess that he has heard all these arguments before, not only by us but inside his own head.
The difference lies in that we believe he is applying selective bias & cognitive dissonance in order to reassert his faith and cover up the cracks. Why does he do it then? Because the world makes more sense, is happier & fairer this way.
An example of this is when AbuY says atheist & kaffirs could go to heaven, when the quran & hadith clearly say a number of times that they wont. This causes a problem with his make "more sense, is happier & fairer this way" utopian view and he reaches a point in his arguments where he admits "this bit does not make sense". Thats the point where most of us have gone just one step further to say "thats because its manmade". And now it makes complete sense.
Anyhow sorry to digress
