Actually most atheists say they "know" there's no God, no soul, no afterlife and everyone else is a delusional fool believing in fairy tales.
My experience on this site is that most atheists fall into the "weak" variety - i.e. no actual "belief".
But if you'd care to support your claim...
As for incapable of providing evidence, you're right, just as how an ancient person is incapable of providing evidence for the existence of a blackhole, electromagnetism, quark, etc....similarly how can one design an experiment that would verify if a soul/God/afterlife is true or false? Atheists say nothing to this they just say you're living in fantasy and escape the question. Similarly there is also no experiment that would verify if the many-worlds interpretation or the copenhagen interpretation is correct, but that doesn't mean they're false, it just means in our current time there is no way to test it.
One - there is a difference between a theory that is testable but not with current means, and a theory that is entirely un-testable.
Second - if there is no evidence - whether because it doesn't exist or because there is no way YET to provide evidence - then it is still IRRATIONAL TO BELIEVE in the existence of that thing. At a later time that thing might well come to be shown to exist - but until that time it is IRRATIONAL to believe it as truth without evidence.
Also through your logic a physicist who believes in the many-worlds interpretation must be delusional since there's no experimental evidence that distinguishes if its true or false....
To believe the theory as truth would not so much be delusional (one can bicker about the meaning of that word) but certainly irrational. To believe that it is a POSSIBILITY is perfectly legitimate and rational - as long as it fits all known evidence.
God IS A POSSIBILITY - in so much as God is an intelligent creator of the Universe - but there is no rational reason to BELIEVE THAT AS TRUTH as there is no evidence.
How different are atheists from theists who condemn others? You possess the same mentality, ridiculing and judging others for their beliefs.
Atheists do so from a position of logic and reason - logic and reason that everyone should have. Theists, on the other hand, do so merely from the strength of their conviction. THAT is the difference.
Most theists simply say this is their personal belief, atheists on the other hand don't say that, they say everyone else is delusional and lives in fantasy, except for them....
Whether it is "personal belief" or not is irrelevant. If it is a belief without evidence then it is irrational, whether it is just your belief or that held by a billion or more other people on the planet.
Again you dodge what I stated, the actual truth is the truth with or WITHOUT evidence, atheists seem to believe that evidence causes something to become true, but it doesn't, its true with or without evidence...
Again - the actual objective truth is irrelevant. What matters with regard the rationality (or lack thereof) of belief IS evidence.
If there IS evidence - objective evidence (or as close as we can get to that ideal) then this negates the need for "belief" and the evidence becomes fact.
...so someone who believes in the idea of a soul or a mind independant of matter isn't neccessarily a delusional fool like atheists believe, they could indeed be correct...
And they would still be irrational for believing it - whether ultimately right or wrong.
and also if there is a mind or soul independant of matter then there would likely be an afterlife or consciousness after death of the body.....
And if you believe that you would be irrational, given the absolute lack of evidence for it.
To put it another way...
The label of "
delusional" and / or "
irrational" is not attributed to the end fact (e.g. whether something exists) but to the journey one takes to get there.
If one's journey is one of belief without evidence then this is delusional / irrational (depending on how you define those terms).
If one's journey is to go by the clear objective evidence then this is not.
The objective truth might be X, and the irrational people might have believed X much earlier than the others had evidence for X - but the irrational people would still have been irrational while they believed without evidence.