The one thing I have noticed about fervently "religious" people is that they often do not question their own beliefs or fairly examine the beliefs of others. One function that religious belief has in human psychology is that it provides a framework for what is called 'black-white' thinking. Something is Right or Wrong and there is no middle ground, no grey area. Many fervently religious people I have encountered have mostly been like this. They seem to need a way to judge the world and accept or reject things (or people) without actually looking at them. Years ago I read Joseph Campbell's series called Masks of God and I have used that phrase (Masks of God) to explain the diversity of human experiences of the Divine (or whatever you want to call it.) We all don't all see the same God in the same way. But that's OK.