Tom, you seem to be falling into what, for lack of a better term, I would call Atheistic Fundamentalism. I am not sure that this is the same thing that John is speaking of, but it does exist.

Let us define fundamentalism. According to Merriam Webster the definition is.
a movement or attitude stressing strict and literal adherence to a set of basic principles
An atheistic fundamentalism would be a movement would be an adherence to the basic principle that any religious theory is automatically wrong. This rather simple basic principle allows people to lump Christianity and Wicca into the same boat and not appreciate the differences between them. Here is an example of something an Atheistic Fundamentalist would say.
The difference between science and religion is the difference between a willingness to dispassionately consider new evidence and new arguments, and a passionate unwillingness to do so….The difference between science and religion is the difference between a genuine openness to fruits of human inquiry in the 21st century, and a premature closure to such inquiry as a matter of principle.
This attitude ignores the great Scientific advances of history were brought about through a religious study of creation. At one time this was from the Muslim world, from which we have the root of our arithmetic, astronomy, and medical science. And at a later date from the Christian world, which gave us our current understanding of astronomy and physics. trying to tell me that my believing in God precludes me looking at His creation with any ability to understand it ignores the history of science and religion. Plus, it shows that the person speaking has no real idea of who I am or what I am capable of.

Yes, Atheistic Fundamentalism exist, and maybe the reason you cannot see it is because you are standing inside of it looking out.