The thread is very likely a waste of time because it is rare for anyone to change their stance on this issue.
However, at times people do change their minds and begin believing there is a God, and there are even instances in which someone believed in God but decided it's rubbish, even those who were very heavily involved in religion.
There is a former nun name Karen Armstrong, she was a nun for a long time, but eventually through her heavy religious history studies it began to appear to her that religions are made up and that there is unlikely to be a God. She wrote a big detailed book titled A History of God to show how strong indication is it's made up stuff by man.
A preacher for 15 years was adamant about there being a God and Jesus the way to salvation, but as he learned more and more he came to the realisation there is not a God. His name is Dan Barker and he wrote a book titled Godless. Today he is one of the leading atheists in the United States.
The authors of those two books were extremely studious but instead of it Istrengthening their beliefs it weakened them.
In the past god may look funny when god will create bread from earth dust.But now it was understandable when quantum mechanic have been found.
http://www.cnet.com/news/stephen-hawking-makes-it-clear-there-is-no-god/