there are many pro atheist arguments my favorites for christians are:
if Satan was the snake in the garden of eden, and Satan was a fallen angel that means that angels are not HUMAN souls as the bible says.
three words WAS JESUS SINLESS answer yes, then go on internet to find all ways Jesus committed crimes(worked on sabbath), if no then it falls apart.
the bible says for parents to kill all disrespectful children, why don't you observe this rule.
* * *My favourite is that religion assumes there is free will -- or, in other words: that there is "God", "sinner", "Saviour", each with his own will. (That your acts are to be metered with the degree they obey the "will of Father" etc.) But free will is false, I will show it shortly below.
Human will would like that everything depended on it: it wants to be efficient. But it's not always so. And therefore the decision "what determines what (and what is left beyond determinism)" is not ours.
We are not responsible for that which -- according to the will of God (see above) -- follows deterministically from something else. And about randomness, which attacks us, there is no will of God, imperative or anything -- it is fatum, and not something to change.
http://freethoughtpedia.com/wiki/Top_ten_arguments_for_the_existence_of_God
(with debunking)