If you can speak and debate ,you have one thing .If you just keep repeating SHOW PROOF,or SEE A DOCTOR ,to people who believe what they believe because of things other people cannot comprehend ,or its based in faith , it doesn't seem like these people post to debate anything. They post because just because they like to act superior to people they deem beneath, them mentally .
This has caused many constituents of this forum ,to go to other forums ,and there are many people here who do not post,for fear of ridicule. which I think is a shame . .
And there are forums ,that have a title,and that is what they discuss there.
Its to exchange ideas with people who are in your clique .Not argue as to why you believe what you do.
Im not saying a good debate isnt a healthy thing , but my observation is ,its not always a debate ,as so much a bashing party .
My observation would have to be ,some people get off on the bashing part .
I mean there's a reason I posted this in psychology
I don't doubt there are those that just ridicule from the outset, i've bumped into a few myself, but that just falls under what I said when I said "how they'll filter out other views to hold onto their own". There are forums (as you said) that deal with a particular mindset or belief, but as this isn't one of those then you need those that counter any claim made. I'd also have to point out that I have bumped into just as many believers who refuse to act reasonably in a debate - for example, if a claim is made regarding something that affects us all, say medicine, or the environment for example, and someone with a great deal of knowledge posts on that topic countering the claim, or debunking the claim, then it's in the interest of the topic and all those reading it to see that information.
The psychology of dismissing just for the sake of it is the same as the psychology of refusing to debate with sceptical views, in so much as it's protecting a mindset to the point of stubbornness.
Another side that i've seen is that I think occasionally people post personal beliefs that they hold dear, and expect only like minded people to post on it, whereas in reality they would have been better off putting it in a blog if they wanted to avoid any resistance to their thoughts.