There are so many religions out there....so many Gods... so many "bibles" (i.e. religious texts). Who are you to tell people to believe in
what? What gives your "particular religion" the authority to claim ultimate truth?
This phenomenon alone supports the idea that religion is merely a man-made entity, arisen from different
cultures/geographic areas, and is not the truth.
Obviously, one may argue, there is "good" religion, like Christianity, hence you should believe in Christianity. But how can you base
the validity / truthfulness of a religion on merely if it's morally good or bad?
In psychological experiments, animals are given food (positive reinforcement) randomly and unpredictability. Then you start to
observe that the animals will form ritualistic body movements to try to obtain the food. The body movements are movements that the
animals were doing right before receiving the food. This shows that religion arose because of one person / caveman who happened to
receive a positive reinforcement by doing something, and has passed on the belief that "by doing that something, you will get
a reward".
Thoughts?