Not even close. Atheism is nothing more than a lack of conviction in the existence of a God or gods. Anyone of any political persuasions can lack conviction.
That's more of a definition of agnosticism. Atheism is a FIRM belief and faith that there is NO God or gods. None.
Within the context of modern definitions, and current usage, you are wrong.
Agnosticism is actually a sub-set of atheisms, where an atheist is defined as those who do not believe any theistic claims have met their burden of proof. In atheist circles it's often referred to as "soft-atheism". Those who take the position that the counter proposition IS true, i.e. there is no god(s), and hold that proposition has met it's burden of proof are called anti-theist, or hold the position of "hard-atheism".
Of course there are variants of this, where some hold that certain definitions of god(s) do not, or cannot exist, but do not extend that to all possible god claims.
You didn't use logic or reason to get into this opinion, I cannot use logic or reason to get you out of it.
You cannot over estimate the unimportance of nearly everything. John Maxwell
