I wonder why the benefits of religious and spiritual beliefs disappear when there is doubt of their existence?
Probably because the benefits are psychological in nature. The peace and the connectedness that religious people may (or may not) experience might be more a function of their believing that they are connected to something, than it is a function of their literally being connected to anything real.
You just can't get that kind of joy, in so many different flavors, when there is skepticism.
I think that people probably can, but achieving it might not be as easy and straightforward.
That's one of the motivations for my interest in Buddhism. It dives deeper than our trying to convince ourselves that the universe is already configured in whatever way that we think will make us happy (even if that's just wishful thinking). It addresses the more psycho-spiritual issue of why we are so dependent on having to think that the universe is a particular way in order to be happy. What is generating that need, and why all the desperate grasping?
I think it is a shame that intellectuals like to destroy the joy of others because they have no joy.
I don't agree that they have no joy. There's a very real joy in pursuing knowledge and the truth.
And there's a very real discomfort at the idea of willfully believing in the truth of something false, in hope of attaining the illusion of happiness. To some minds at least (including mine), that's one of the most dangerous of psychological traps. It's a path that might ultimately lead to madness.
But having said that, I will agree with you that people shouldn't go around willfully trying to burst other people's bubbles. That's inhumane, at the very least. It's also arrogant, since it assumes that the bubble-burster is intellectually superior to the individual in the bubble.
That's why I strongly and viscerally oppose religious missionaries, people who invade foreign cultures and try to subvert and destroy the beliefs of the people that they find there. Christians and Muslims are notorious for this.
And it's why I also strongly and viscerally oppose militant atheists when they gratuitously attack religion and religious people, and when they strut around like mindless little roosters, all puffed-up with the illusion of their own intellectual superiority.
But again having said that, Sciforums is at least ostensibly a science discussion board. So it's something like neutral turf when it comes to religion, though with a strong bias towards evidence and reason. In other words, I don't think that there's any reason why religious people should enjoy any immunities here, or why their emotional sensibilities should receive any special protection.
Maybe spiritual bliss is something to be conserved, like resources and the environment. Spiritual bliss is the environment of the mind. Once it is destroyed in a mind, there is only the wasteland of cynicism. Maybe innocence is something to be preserved.
That is an interesting idea though. I don't think that I agree with it, but it isn't totally indefensible either.
I'm imagining a doctor, who discovers that a patient has an incurable disease. The patient will feel fine and be without symptoms for maybe six months, and then will decline and be dead in a year. Should the doctor tell the patient that he's dying, and cast a dark cloud over those six remaining pain-free months? Or should the doctor say nothing and let the patient live happily during the time he has left?