Evolution (which you don't believe is true) in several ways,
Logic (god is presented to be both completely good but also capable of doing anything, which includes evil acts, thus this cannot logically work) (the devil would have no motivation to even attempt to defy an all powerful being if he had no hope of winning ) (god loves us all, but, should what we believe matter, would allow the majority of us to burn, since no religion is followed by even closer to half of the world population) (the earth definitely orbits around the dun, not the other way around)
I could give more, but all you are going to do is attempt to argue them rather than respect my atheist views.