How can you prove that a religion is false? When you do not get any prayers answered, any or even all of your wishes fulfilled in this life (eventually - it may take a lot of time!)? Or can you(?) find out whether a religion is false only after you are dead if you are then able to find out anything at all??
..... Anyone can invent a belief system, but it takes real talent to come up with something, and suitable sales literature, that makes many people pay a lot of money to clergy for once-a-week performances over centuries.