Vlad,
A good starting point is the Internet encyclopaedia of philosophy which tells you which atheists came up or proposed which definitions and descriptions of atheism.
As you just ignored it last time, once again the very first line of that article reads as follows:
“
The term “atheist” describes a person who does not believe that God or a divine being exists”.
If ever you manage to find an atheist who goes beyond that into “gods don’t exist” by all means take it up with him/her, but on this mb you’re just tilting at windmills. It’s equivalent to me critiquing your belief that god has a big beard and sits on a fluffy cloud.