Believers and non-believers claim to KNOW far more than they do. . . . CA
An unfair generalisation IMO.
I don't often see "unbelievers" (I assume this as generic for Atheist/Agnostic) attempting to promote a world view based on subjective hearsay, an inner voice, intuition, ancient religious beliefs etc., claiming that they just "KNOW" these things, and placing themselves in an unchallengeable position. Indeed, the very use of the term "unbeliever" suggests they claim to KNOW a lot less . . . and what they do know is usually based on reliable and testable evidence.
The two groups are not diametrically opposed, as some seem to have (very simplistically) taken the view here. They are not staring each other down through the same window . . . but looking through entirely different windows. It's simply another leap of faith to assume "unbelievers" have an opposite view or "belief" . . . they simply subject belief to the same scrutiny as everything else. A scrutiny which is welcomed in the scientific community, and seen as a "merciless, snide, scathing and evil attack on faith" in the religious community. The difference, and consequent reactions, have been well illustrated over countless threads on this forum alone.
If I present a personal idea here, I expect it to be rigorously scrutinised. In fact, that is the main purpose for expressing it, to reveal it's flaws. I don't claim to KNOW it, or believe it, only to present it as a possibility for consideration. Expressing belief here, is really like delivering a sermon in a lecture theatre. If you can't endure question time without feeling "under attack" . . . it's better for personal belief to remain just that . . . personal.
A wise man can learn more from a foolish question . . . than a fool can learn from a wise answer.