I am a child of the Enlightenment. I think irrational belief is a dangerous phenomenon, and I try to consciously avoid irrational belief. On the other hand, I certainly recognize that it's a major phenomenon for people in general, and you can understand why it would be. It does, apparently, provide personal sustenance, but also bonds of association and solidarity and a means for expressing elements of one's personality that are often very valuable elements. To many people it does that. In my view, there's nothing wrong with that.