Here's my take:
There is a fine line between believing there are no gods and simply not believing in gods. And, I guess, an absence of evidence for gods can lead someone to believe there are no gods, even though such a belief is nothing more than an unsubstantiated assumption. So, it's a "belief."
However, and this IMO is relevant: Belief that something does not exist because nothing out there indicates that it does is not the same as believing something does exist even though nothing out there indicates that it does.
[DISCLAIMER: the following is clearly facetious, except final paragraph, and disparages all. enjoy.]
Atheists are pompous bits! As if divinity is a creative entrepreneurial spirit, "God." It's the Holy, the Truth, and it is the answers, which humanity could recognize in its infancy of complete ignorance. God knows all, and we know God. It's just like my friend Rick. Super, crazy, smart dude. I go to him for everything. Totally trustworthy in all matters. What he says, I follow. I don't care that he's 107 years old and the last time he was in school was over 91 years ago. He's the best. My whole family loves him, yes we do.
- by a Theist
How single- and closed-minded must you be to be religious? To hell with you God-believers! As if you know, or could know all the answers. I correctly vehemently disbelieve in your beliefs. Dumb-dumbs. I'm narcissistic, sure. I have a sense of bloated self-worth, of course. But common, lets keep things in check. I mean, as if some omniscient, omnipresent thing snaps its fingers and,
bang, we all of a sudden exist. Nonsense. No science could support that.
- by an Atheist
Agnostics are the damned worst. As if indecisiveness is a decision. Morons. It's a belief system at the developmental stage prior to fully formed thought. Oxymoron you! It's like looking at right and wrong and saying neither exists. Join the war, Switzerland. Grab your fatigues and assault rifles, idiots! Something is or isn't. It's either day or night. Sure, the words morning and evening exist, but they could equally be called night-day and day-night, respectfully. See, same words used.
- a collaboration by believers, minus one
I think I've shown my work. Right? Any point of view, or idea that is non-empirically thought to be true, is a belief. A fact, something widely held to be a universal truth, is not a belief; however, some facts started as beliefs, e.g., before someone devised a means of experimentally showing the Earth to be round, the thought of a round Earth was a belief. All things metaphysical are beliefs.