If you really want to make an atheistic movie, make the Bible. No interpretations, just what's in the Bible. The god-mandated rapes and child killing, the incest and wars for property, the abject lack of any moral vision other than obedience to the authority of the priests and prophets and occasionally a king or two, all informing us as to what god wants. And we can leave Jesua bin Josef out of it; he barely exists as a voice. And he believed wholeheartedly in the complete canon of his holy books, blood-soaked genocidal god and all, so he doesn't get a pass from me. And of course, never leave out Revelations, where Jesua the Demigod tosses people who don't believe in him into a blast furnace of eternal torture for ever and ever. There are army torture manuals with kinder instructions than that hellish book.