First, if at all, atheism could, perhaps, to differentiate it from agnosticism, be viewed as a belief, but not as a religion, not even as a belief system.
Secondly, as Bastethotep already touched on, there are polytheistic religions, but also non-pantheistic nature gods, spirits, systems of past gods in absentia, etc.
Third, the system assigned to the Bible god was obviously defined specifically for him. It doesn’t work that way.
The whole categorical system is extremely primative and tendentious. I wrote my thesis about the same time and my professor would have been livid if I had attempted to include such a juvenile definition.