OK, so since nobody disagrees that " there are other alternatives besides Atheism based on gradual evolution ...based on natural selection or ID based on Theism and a divine plan. ", I will add to that point. The word 'God' does not necessarily infer a personal or even an individual being. God simply refers to the Supreme Source of Reality.
Do you mean that "God" is not a part of reality, and therefore necessarily unreal?
The difference between an atheist and a nontheist is that atheism is an assertion that there is no God while a nontheistic path such as buddhism makes no such assertions because it deals with reality only.
Again, you seem to be using the word "God" to denote something necessarily unreal.
And "non-theist" encompasses anyone who isn't a theist, just as "non-communist" encompasses all those who aren't communists.