And believe in ALL of them?
Imagine there were 5000 Gods that people believe or believed (I don't know the exact number, but let's say it is 5000).
Most believers today believe in 1 God and don't believe in 4999 'other Gods'.
Atheists go one God further and don't believe in 5000.
Believers and atheists agree on the existence of 4999 Gods but disagree on one God.
No. Atheists simply express that they don't believe in God. Some attempt to not believe in God, and some of these magnify themselves into a god-position by doing so.
All people are mixed up in some things. Atheists are simply mixed up in who they are magnifying as God.