Believing
There is no philosophical argument trying to prove God's existence stronger than personal experience.
All of the religions depend on believing and believing is knowing something with no evidence (I can say there is a needle in the bottom of the ocean, you can't prove me wrong and I can't prove that I am right).
This leads to that believing in any religion is strongly tied to brain chemistry (if your brain made your mind experience something that feels "spiritual" no one can make you believe otherwise and you will ignore non-sensible things in your religion and you will find arguments and excuses for it).
All what I'm trying to say is that believers aren't necessarily purposely idiots. you simply can't make a believer a non-believer unless something shocking occurred that changed their brain chemistry.
(it doesn't have to be a shocking event, people as they age their brain chemistry changes, and also being exposed to intriguing questions or ideas or just normal human curiosity which lead to doubt and maybe eventually non-believing)
and also being a believer or a non-believer doesn't make you any special, we should all respect each other.
*I'm not talking about any specific religion or belief system, and I'm not addressing religious texts that have contradictions or immoral teachings, I am only talking about believing in general and how it can make you blind about many things in your own religion.