If there is no God, the god believing people will be the first to get annihilated. Why?
Christian people are supposed to be the most softest people. Just like the Amish people. If they were not being protected, they too would be annihilated. If you shoot them with guns, they don't have guns to shoot back. It is taught in the Bible that thou shalt not kill. A gun is a weapon to kill. While I don't know the real numbers but I'm saying that the church folks that I know, do not believe in violence so they do not own any weapon. Even if you strike them, they will give you their other cheeks so you can finish the job. Them saints and holy figures like Jesus Christ did not fight back when they are being prosecuted.
If this is the case and when there is no God, no law, a Savage world, the Christians will be the first to go. They believe that it must be God's will. Thy kingdom come, thy will be done, rapture before the resurrection.