Everyone has the right to believe what they want. Of that belief is ingrained then you won�t shift it will you?
Theists have a deep faith that they will reach a life ever after, they also believe that they can do anything including murder and providing they confess before god they sinned that O.K then, not all Theists believe it but many do.
They use this faith and belief as the crutch that supports their moral and intellectual judgement through their lives, why they chose one way and not another has never been made clear to me, but I do no that Theists who disagree with each other, because there can be no discourse to convince either side, will resort to violence. Sooner or later.
Atheists on the other had are convinced there is no god, they have no more evidence for this theory than the Theists do for theirs, but this doesn�t stop the Theists from trying to impart their will on the Atheists.
Atheists manage in the most part manage to run their lives without the promise of jam tomorrow and will never be judged by god. If however they �confess� at death they will be forgiven all their sins or will burn in hell forever or go to purgatory or will be reborn as a Frog or some such.
However a bit of rather compelling evidence is this some years ago God spoke to everyone in the middle east. A virgin here a burning bush there a prophet here, you get the picture, however about 2000 years ago god stopped speaking to anyone, apart from Americans, point being why?