The majority of people think that everything they believe is true and correct. Most people aren't aware enough that they can step back and take a look a the big picture. It takes a certain amount of awareness to realize "I am not the center of the universe". But it's human nature to believe this.
Even with the most basic and insignificant things, most people can't fathom that what they feel isn't a universal truth. Just look at simple opinions, like "this book is good." People can't even agree over trivial things like this because they don't understand that "good" is relative to everyone.
It's like Itachi's quote, and it's why it's one of my favorites. "Every human being relies on and is bounded by his knowledge and experience to live. This is what we call “reality”. However, knowledge and experience are ambiguous, thus reality can become illusion. Is it not possible to think that, all human beings are living in their assumptions?"
As far as religion goes... I don't have a problem with those who are religious, but I also do find it annoying when people try to press their beliefs on others and present them as universal facts. I think religion is great thing for those who find guidance or comfort in it. Who knows, maybe one day I'll believe in a benevolent God if something bad happens to me.
Right now though, IMO I think it's ridiculous to think that us humans could possibly understand an omnipotent all knowing God. I find it unlikely that a God who created time, the universe, everything, could possibly care about us humans. We are on one planet orbiting one star that is among billions of other stars in a galaxy that is among billions of other galaxies. In that sense, IMO we would be as insignificant as ants are to us to an all mighty being. But again, it all circles back to human nature - the belief that we are the singular most important thing in the universe. The belief that the universe revolves around us.
My personal belief is that there may or may not be a god, and that there will never be a way to truly know. Because we dont have the capacity to possibly perceive such a being. So basically, it's really all up to what you want to believe.
Sorry for pouring out all of my religious beliefs out here on NB. Also, sorry for the long and rambling post and if I don't make any sense. Just finished a 3 hour long test and my brain feels fried Zzz