Some people believe that it requires some leap of faith to disbelieve god's existence. This is absolutely idiotic. Atheism is a lack of a belief in god. If you are religious, ask yourself: "Why do I believe in god?" Whether or not you claim to have evidence for your faith, the correct answer is because someone taught you about god. You did not know what god was until someone told you. Either you were taught, or you invented your own version of god, deluded yourself, and poisoned other minds with your falsehoods.
One cannot make the argument that atheism requires a leap of faith. Nonbelief is not an active conscious process. One would not continue throughout their day repeating "I don't believe. I don't believe. I don't believe." Justification of disbelief is a different process entirely. Rejecting belief is an active conscious process but maintaining disbelief is not because there is nothing to maintain. Belief is always an active conscious process. Belief requires constant reaffirmation e.g. "I believe because of this, that, and the other." Disbelief does not require this. Faith can only exist in the presence of a conscious appeal to the mind. If the conscious appeal is gone (or never existed in the first place) then one cannot believe. Arguing for the case of the opposite simply does not make sense. There is no conscious appeal to disbelief. The truth is, god is a concept invented by man.