I have seen some pretty rational, critical thinking people, just shut their brains off when they begin speaking of their religion, it is the only way I can describe it. You can have hours of conversation where you discuss code, engineering, culture, mass media etc, where it is 'normal'.
You ping ideas off one another, discuss the angles behind things, where falsehoods or agenda might lie etc, but if the conversation steers to religion, their face goes blank, their tone goes flat, and they spout of a set of rules/angles on things, their tone and body poster changes to one in which there will be absolutely no argument or discussion.
If you've ever been with someone in therapy whom is going over difficult subjects that they have walled off or uncomfortable truths, they sort of go into that same sort of 'dead' posture. They look off in one direction, don't blink as much, breath more shallow, sort of like they put their body/brain on pause and are waiting for you to finish, and then the topic hurriedly changes.
I feel like when I've been put in a position like that, my brain is rapidly composing internal defenses to to shut out and defend what it already knows as truth. I think that is very similar to when religion comes up, and really not just that but any kind of argument. People are set in how they want to believe, and no amount of argument is really going to change that.
I used to call myself agnostic, saying you can't disprove the existence of some sort of godlike creature in which every religion perhaps 'feels' an aspect of, or the fact that the need/want to have a religion in our lives taps into 'something' about ourselves or our universe that we can't quite detect (4th dimension! ;) ), and we call that our spirituality. Something along those lines, it felt more precise to say 'who knows' rather than 100% certainty atheism.
Then I married a catholic, and had to attend various church functions for varying christian faiths in the area, the usual, funerals/baptisms etc. I went to church on holidays and stuff because it didn't matter to me either way. Well, after listening to what people were saying, how people were acting etc, I feel much more comfortable calling myself an atheist, and actually it became very important for me to not go to any church functions short of the birth/death/wedding functions (because those are about the people) to show how much I disagree with the things I've heard and seen. The way money collections and 'mandatory donations' are integrated into the religion is quite frankly disgusting, not only the selective morality and bigotry I hear preach towards members of other religions that is wrapped up in the things they say.
"We should trust everyone.... so long as the believe in Jesus our lord"
A lesson to children: *holding a stick* "What happens to people's morals if they don't have faith in our lord" *Snaps the stick* It breaks!!
I had to attend a baptism class, the deacon there was just spouting of some of the most insane logic I've heard, including stuff I've read on the internet. It was pure madness, and the worst part was everyone around me nodding their head going 'ohh, ooohh!!'. I wanted to stand up and yell WHAT THE FUCK?! WHAT THE FUCK ARE YOU TALKING ABOUT!!! The guy actually printed out a picture of a water strider "Have you heard of this guy?! It's called a water strider." People in the class "Ohhh, yeah yeah, I think I've heard of those" Continues deacon "Well, this little guy here, walks.... on water." "If there exits a creature in this world that can walk on water, so to can jesus walk on water. If one things is true, another thing must be true!"
People were like raptly looking forward eating this stuff up, noding, going OOOH, yeah, yeah!!! to his insane logic.
These are all pretty reasonable people from what I can tell, college educated, do rational things, make smart decisions when it comes to many parts of their life, but when it comes to religion, the brain shuts down, and they enjoy the ride.
That is ok for plenty of people, just so long as they don't try to force that view down other people's throats, we are all good. Still though, I just cant understand why many people don't apply the critical thinking they use daily to all aspects of their beliefs.
Meh, longer rant than I expected.