Vultur wrote:
Simply because religious feelings are perceived in the brain, that does not make them false.
Right. If they don't correspond to anything outside of the experiencer's brain, however, that usually does make them false (or at least, it makes the conclusion sensible).
Sight is registered through the brain, and visual images can be triggered by brain injury or other methods - that doesn't mean that sight is false, or the things we normally see don't exist.
Right, but how can we tell the difference between something that we see that isn't real and something that we see that is real? Hallucinations and the like, or, conversely, the absence in consciousness through an operation? We can work out that our senses/mental perception were wrong, repeated false information, or were absent while everything else continued on around us.
By the way, why do you see religion as harmful, even if you are correct that it is false?
Oh man, where to start? In addition to Mike's post, consider the following:
"Now faith is the substance of things hoped for, the evidence of things not seen." -Hebrews 11:1 and
"If you can believe, all things are possible to him who believeth." - Mark 9:23. Faith, the whole epistemological foundation of religion, can be used to believe in anything not seen. It counts as proof for its own veracity to its believers, that no amount of reality can cure or dissuade the "true believer" from, no matter how immoral or absurd.
That is an incredibly unhealthy spawning ground for ideology and the inevitable in/out group delineation as these ideas gain social traction. Faith, where mere conviction and mere belief are the unifying virtues, rather than solid argumentation and evidence, will logically lead to more fanatical figures being more powerful, and thus proliferate human suffering better than most other social phenomena. Religion is yet another means to define a tribe, an in-group, and another way to demonise the out-group. It's just about the best thing for convincing something that an immoral act is moral, because of its insidious nature via indoctrinating the young and affecting the wider community through peer pressure.
Consider the story of Abraham and Isaac; consider the "great religions" of modern day, based on that core story. What is the important moral of the tale? It's not that God doesn't require human sacrifice, it's that Abraham is virtuous for believing so hard in God that he was preprared to kill his own son against his own moral compass. Couple this sort of basis with the parasitic behaviour Mike pointed out and religion's the perfect vehicle for authoritarian, mob and evil behaviour, through its socially revered status, and at best is totally superfluous for moral behaviour.
Lastly, consider philosophy when it splits from religion and its benefits. 3rd century BC, you have Epicurus developing a secular morality and declaring that gods do not concern themselves in human endeavours. 1st century AD, you have Jesus (supposedly a ground-breaking moral philosopher) telling us that to reject him is worthy of eternal punishment and that it is better to give all your problems to god, forgive anyone of anything they did to you and to even think about sex with someone else or violence is as bad as adultery and murder in real life. Totalitarian thought control vs ethical hedonism. I'm sorry, but religion is dirge and whenever it becomes more powerful, human misery increases.
That's why I'm an antitheist.