Religion is one of those things that sort of, in and of itself, defies much of who we really are naturally. At least, that's my opinion. We are typically curious, rational creatures. Don't get me wrong, gullibility is alive and well and thrives in many. But generally we ask a lot of questions, we seek out multiple answers, we sift through the data, and we formulate our opinion. If we have a truly open mind its difficult to narrow down one particular thing that strikes us as being absolutely, irrefutably true. I've heard a lot of people who are religious say they are open-minded. They are not. Nor are atheists open-minded. You cannot have one view that disallows the possibility of all other views and be open-minded.
I'm not sure exactly where I am on religion. I don't necessarily believe in God, but I do not consider myself to be an atheist either. I like to use the term spiritual, though my Christian sister always tells me she doesn't like it when people call themselves that.
I explore science and theology and biology and I form an opinion based on the sum of all the parts. I know that the Bible cannot be 100% accurate, nor can the big bang theory be absolutely true, nor can the theory of evolution be without some flaws.
For people to, however, force their views on another, or disbar them from their "club" based on their views is disingenuine and rude. I am a republican. But you don't have to be a republican to be my wife, my child, or my friend. Christians tend to do a lot of judging and condemning. I think those actions defy what even Christianity should be.