Answer to the OP. Realize that many atheists and nonbelievers have never believed in anything strong enough to cause any results in their Life. Therefore, most have no reason to believe in any god and have all the experience to support that view. They miss out on the luxuries of belief and remain as skeptics. Beliefs cause results, I wish alot of those guys could accept that fact, it would help them understand why many beliefs in God or in gods exist.
But, see, I do understand why many beliefs in god/s exist.
1: humans have evolved with a tendency to attribute agency that may have been an asset to survival in the past. (You will live longer if you see tigers in the grass where there are none than if you see no tigers where there is one).
2: human culture for almost all of our history, in every corner of the world, revolves around story-telling - the transmission of ethics, language and culture in the context of a gripping narrative, whether through a dance to illustrate the recent hunt, an orally transmitted lineage, or a pantheon of supernatural characters demonstrating the application of our values through their antics.
3. It is very reasonable, considering the evidence, to suspect that our minds have difficulty telling the difference between fact and fiction because we have not evolved with the ability to completely isolate different quadrants of the brain. (I.e. dreaming from waking, speaking from feeling).
Nobody argues that beliefs don't cause results, BTW. We often argue that certain beliefs cause
undesirable results, on the balance. For example, the powerful YEC lobby is having a seriously detrimental impact on public education in the US, putting an entire generation of American students at a competitive disadvantage in the sciences.
FYI, I have had two major life-changing breakthroughs that were strong enough to cause huge results in my life. 1: I realized I should not make decisions based on fear. 2: I realized I can not read minds, so I stopped speculating about what other people are thinking. These qualify as beliefs - I have no proof that fear-based decisions are generally wrong, and I have no proof I can't read minds. Imagine that! Results without gods!